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High School Math : Algebra II

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Example Questions

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Example Question #1 : Understanding Radicals

What is the value of $9^ \frac{5}{2}$ ?

Possible Answers:

2.41

243

Correct answer:

243

Explanation:

An exponent written as a fraction can be rewritten using roots. $9^ \frac{5}{2}$ can be reqritten as $\sqrt[2]{9^5}$ . The bottom number on the fraction becomes the root, and the top becomes the exponent you raise the number to. $\sqrt[2]{9^5}$ is the same as $(\sqrt[2]{9})^{5}=3^{5}$ . This will give us the answer of 243.

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Example Question #3 : Expressing Radicals As Exponents

Express the following radical in rational (exponential) form:

$\sqrt{8x^3y^4}$

Possible Answers:

$2^2x^{(\frac{3}{2})}y^2$

2^2x^2y^2

$2^{(\frac{3}{2})}x^2y^2$

$2^{(\frac{3}{2})}x^{(\frac{3}{2})}y^{(\frac{3}{2})}$

$2^{(\frac{3}{2})}x^{(\frac{3}{2})}y^2$

Correct answer:

$2^{(\frac{3}{2})}x^{(\frac{3}{2})}y^2$

Explanation:

To convert the radical to exponent form, begin by converting the integer:

$\sqrt{8x^3y^4}$

$=\sqrt{2^3x^3y^4}$

Now, divide each exponent by to clear the square root:

$=2^{(\frac{3}{2})}x^{(\frac{3}{2})}y^{(\frac{4}{2})}$

Finally, simplify the exponents:

$=2^{(\frac{3}{2})}x^{(\frac{3}{2})}y^2$

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Example Question #4 : Expressing Radicals As Exponents

Express the following radical in rational (exponential) form:

$\sqrt[4]{96a^5b^7c^8}$

Possible Answers:

$2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^2$

$3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{1}{4}}b^{\frac{7}{4}}c^2$

$3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}$

$3^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^2$

$3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^2$

Correct answer:

$3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^2$

Explanation:

To convert the radical to exponent form, begin by converting the integer:

$\sqrt[4]{96a^5b^7c^8}$

$=\sqrt[4]{3\cdot 2^5a^5b^7c^8}$

Now, divide each exponent by to cancel the radical:

$=3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^{\frac{8}{4}}$

Finally, simplify the exponents:

$=3^{\frac{1}{4}}2^{\frac{5}{4}}a^{\frac{5}{4}}b^{\frac{7}{4}}c^2$

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Example Question #5 : Expressing Radicals As Exponents

Which fraction is equivalent to $\frac{x^{\frac{5}{2}}}{x^{\frac{1}{2}}+y^{\frac{1}{2}}}$ ?

Possible Answers:

$\frac{x^3+x^{\frac{5}{2}}y^\frac{1}{2}}{x+y}$

$\frac{x^3+x^{\frac{5}{2}}y^\frac{1}{2}}{x-y}$

$\frac{x^3-x^{\frac{5}{2}}y^\frac{1}{2}}{x-y}$

$\frac{x^3-x^{\frac{5}{2}}y^\frac{1}{2}}{x+y}$

Correct answer:

$\frac{x^3-x^{\frac{5}{2}}y^\frac{1}{2}}{x-y}$

Explanation:

Multiply the numerator and denominator by the compliment of the denominator:

$=\frac{x^{\frac{5}{2}}}{x^{\frac{1}{2}}+y^{\frac{1}{2}}} \cdot \frac{x^{\frac{1}{2}}-y^{\frac{1}{2}}}{x^{\frac{1}{2}}-y^{\frac{1}{2}}}$

Simplify the expression:

$=\frac{x^3-x^{\frac{5}{2}}y^\frac{1}{2}}{x-y}$

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Example Question #2 : Understanding Radicals

Simplify the following radical. Express in rational (exponential) form.

$\frac{x^{\frac{2}{3}}}{x^{\frac{2}{3}}-x^{\frac{-1}{3}}}$

Possible Answers:

$\frac{x}{x-2}$

$\frac{x}{x-1}$

$\frac{x}{x^2-1}$

$\frac{x^2}{x-1}$

Correct answer:

$\frac{x}{x-1}$

Explanation:

Multiply the numerator and denominator by the compliment of the denominator:

$=\frac{x^{\frac{2}{3}}}{x^{\frac{2}{3}}-x^{\frac{-1}{3}}} \cdot \frac{x^{\frac{1}{3}}}{x^{\frac{1}{3}}}$

Simplify the expression:

$=\frac{x}{x-1}$

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Example Question #7 : Expressing Radicals As Exponents

Choose the fraction equivalent to $\frac{x^{\frac{1}{2}}-y^{\frac{1}{2}}}{x^{\frac{1}{2}}+y^{\frac{1}{2}}}$ .

Possible Answers:

$\frac{x+2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x-y}$

$\frac{x+2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x+y}$

$\frac{x-2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x-y}$

$\frac{x-2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x+y}$

Correct answer:

$\frac{x-2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x-y}$

Explanation:

Multiply the numerator and denominator by the compliment of the denominator:

$=\frac{x^{\frac{1}{2}}-y^{\frac{1}{2}}}{x^{\frac{1}{2}}+y^{\frac{1}{2}}}$ $\cdot \frac{x^{\frac{1}{2}}-y^{\frac{1}{2}}}{x^{\frac{1}{2}}-y^{\frac{1}{2}}}$

Simplify the expression:

$=\frac{x-2x^{\frac{1}{2}}y^{\frac{1}{2}}+y}{x-y}$

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Example Question #8 : Expressing Radicals As Exponents

Simplify the following radical. Express in rational (exponential) form.

$(\frac{a^{\frac{-2}{3}}}{2^{\frac{1}{2}}a^2})^{\frac{-1}{2}}$

Possible Answers:

$2^{\frac{1}{4}}a^{\frac{5}{3}}$

$2^{\frac{1}{2}}a^{\frac{4}{3}}$

$2^{\frac{1}{3}}a^{\frac{4}{3}}$

$2^{\frac{1}{4}}a^{\frac{4}{3}}$

Correct answer:

$2^{\frac{1}{4}}a^{\frac{4}{3}}$

Explanation:

Multiply the numerator and denominator to the exponent:

$(\frac{a^{\frac{-2}{3}}}{2^{\frac{1}{2}}a^2})^{\frac{-1}{2}}$

$=\frac{a^{\frac{1}{3}}}{2^{\frac{-1}{4}}a^{-1}}$

Simplify the expression by combining like terms:

$=2^{\frac{1}{4}}a^{\frac{4}{3}}$

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Example Question #9 : Expressing Radicals As Exponents

Express the following radical in rational (exponential) form:

$\sqrt[3]{16x^5y^6z^8}$

Possible Answers:

$2^2x^{\frac{5}{3}}y^2z^{\frac{8}{3}}$

$2^{\frac{4}{3}}x^{\frac{5}{3}}y^{\frac{7}{3}}z^{\frac{8}{3}}$

$2^{\frac{4}{3}}x^{\frac{5}{3}}y^2z^2$

$2^{\frac{4}{3}}x^{\frac{5}{3}}y^2z^{\frac{8}{3}}$

$2^{\frac{4}{3}}x^2y^2z^{\frac{8}{3}}$

Correct answer:

$2^{\frac{4}{3}}x^{\frac{5}{3}}y^2z^{\frac{8}{3}}$

Explanation:

To convert the radical to exponent form, begin by converting the integer:

$\sqrt[3]{16x^5y^6z^8}$

$=\sqrt[3]{2^4x^5y^6z^8}$

Now, divide each exponent by to remove the radical:

$=2^{\frac{4}{3}}x^{\frac{5}{3}}y^{\frac{6}{3}}z^{\frac{8}{3}}$

Finally, simplify the exponents:

$=2^{\frac{4}{3}}x^{\frac{5}{3}}y^2z^{\frac{8}{3}}$

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Example Question #10 : Expressing Radicals As Exponents

Simplify: $(\frac{2^4a}{a^2b^{-1}})^{\frac{-1}{2}}$

Possible Answers:

$\frac{a^{\frac{1}{2}}b^{\frac{1}{2}}}{2b}$

$\frac{ab^{\frac{1}{2}}}{4b}$

$\frac{a^{\frac{1}{2}}b}{4b}$

$\frac{a^{\frac{1}{2}}}{4b^{\frac{1}{2}}}$

Correct answer:

$\frac{a^{\frac{1}{2}}}{4b^{\frac{1}{2}}}$

Explanation:

Multiply the numerator and denominator to the exponent:

$(\frac{2^4a}{a^2b^{-1}})^{\frac{-1}{2}}$

$=\frac{2^{-2}a^{\frac{-1}{2}}}{a^{-1}b^{\frac{1}{2}}}$

Simplify the expression by combining like terms:

$=\frac{a^{\frac{1}{2}}}{4b^{\frac{1}{2}}}$

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Example Question #11 : Expressing Radicals As Exponents

Express the following exponent in radical form:

$x^{\frac{1}{3}}y^{\frac{1}{2}}z^{\frac{3}{2}}$

Possible Answers:

$z\sqrt[6]{x^2y^3z^3}$

$z^3\sqrt[6]{x^2y^3z^3}$

$\sqrt[6]{x^2y^3z^3}$

$z^6\sqrt[6]{x^2y^3z^3}$

$z^2\sqrt[6]{x^2y^3z^3}$

Correct answer:

$z\sqrt[6]{x^2y^3z^3}$

Explanation:

Begin by converting each exponent to have a denominator of :

$x^{\frac{1}{3}}y^{\frac{1}{2}}z^{\frac{3}{2}}$

$=x^{\frac{2}{6}}y^{\frac{3}{6}}z^{\frac{9}{6}}$

Now, rearrange into radical form:

$=\sqrt[6]{x^2y^3z^9}$

Finally, simplify:

$=z\sqrt[6]{x^2y^3z^3}$

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High School Math : Algebra II

Study concepts, example questions & explanations for High School Math

All High School Math Resources

Example Questions

Example Question #1 : Understanding Radicals

Example Question #3 : Expressing Radicals As Exponents

Example Question #4 : Expressing Radicals As Exponents

Example Question #5 : Expressing Radicals As Exponents

Example Question #2 : Understanding Radicals

Example Question #7 : Expressing Radicals As Exponents

Example Question #8 : Expressing Radicals As Exponents

Example Question #9 : Expressing Radicals As Exponents

Example Question #10 : Expressing Radicals As Exponents

Example Question #11 : Expressing Radicals As Exponents

All High School Math Resources

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