Algebra 1 : Binomials

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #2 : How To Find The Value Of The Coefficient

Give the coefficient of  in the product  

Possible Answers:

Correct answer:

Explanation:

While this problem can be answered by multiplying the three binomials, it is not necessary. There are three ways to multiply one term from each binomial such that two  terms and one constant are multiplied; find the three products and add them, as follows:

 

 

 

Add: 

The correct response is .

Example Question #1 : How To Find The Value Of The Coefficient

Give the coefficient of  in the binomial expansion of .

Possible Answers:

Correct answer:

Explanation:

If the expression  is expanded, then by the binomial theorem, the  term is

or, equivalently, the coefficient of  is 

Therefore, the  coefficient can be determined by setting 

:

Example Question #1 : How To Find The Value Of The Coefficient

Give the coefficient of  in the binomial expansion of .

Possible Answers:

Correct answer:

Explanation:

If the expression  is expanded, then by the binomial theorem, the  term is

or, equivalently, the coefficient of  is 

Therefore, the  coefficient can be determined by setting 

:

Example Question #3 : How To Find The Value Of The Coefficient

Give the coefficient of  in the binomial expansion of .

Possible Answers:

Correct answer:

Explanation:

If the expression  is expanded, then by the binomial theorem, the  term is

or, equivalently, the coefficient of  is 

Therefore, the  coefficient can be determined by setting 

Example Question #2 : How To Find The Value Of The Coefficient

Give the coefficient of  in the product

.

Possible Answers:

Correct answer:

Explanation:

While this problem can be answered by multiplying the three binomials, it is not necessary. There are three ways to multiply one term from each binomial such that two  terms and one constant are multiplied; find the three products and add them, as follows:

 

 

 

Add: 

The correct response is -122.

Example Question #1 : How To Find The Value Of The Coefficient

What is the value of the coefficient of ?  

Possible Answers:

Correct answer:

Explanation:

In order to determine the coefficient, we will need to fully simplify this expression.

The numerator of the first term shares an  variable, which can be divided.

Subtract this expression with .

The coefficient is the number in front of .  The coefficient is .

Example Question #1 : How To Find The Solution To A Binomial Problem

Solve for

Possible Answers:

Correct answer:

Explanation:

First, rearrange the equation so that "like terms" are grouped together, like this: .  

Second, combine "like" terms with the appropriate mathematical function (i.e., addition, subtraction, etc.), so in this problem, you'll be left with .  

Third, set the entire equation equal to  and solve for 

Example Question #2 : How To Find The Solution To A Binomial Problem

Solve for .

Possible Answers:

Correct answer:

Explanation:

First, rearrange the equation so that "like terms" are grouped together, like this: .  

Second, combine "like" terms with the appropriate mathematical function (i.e., addition, subtraction, etc.), so in this problem, you'll be left with 

.  

Third, solve for 

Example Question #2 : Finding Roots

Solve for :

Possible Answers:

Correct answer:

Explanation:

Example Question #1 : How To Find The Solution To A Binomial Problem

Solve for  in terms of .

Possible Answers:

Correct answer:

Explanation:

First, add 8y to both sides of the equation, cancelling out -8y and isolating x to a value in terms of y:

4x - 8y = 32

     +8y     +8y

4x = 32 + 8y

Then divide both sides of the equation by 4, providing the x-value in terms of y:

x = 8 + 2y

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