All SAT Math Resources
Example Questions
Example Question #1 : Binomials
If 〖(x+y)〗2 = 144 and 〖(x-y)〗2 = 64, what is the value of xy?
Possible Answers:
22
18
16
20
Correct answer:
20
Explanation:
We first expand each binomial to get x2 + 2xy + y2 = 144 and x2 - 2xy + y2 = 64. We then subtract the second equation from the first to find 4xy = 80. Finally, we divide each side by 4 to find xy = 20.
Cole
Certified Tutor
Certified Tutor
UW Madison, Bachelors, Industrial Engineering. UW Madison, Masters, Industrial Engineering.
All SAT Math Resources
SAT Math Tutors in Top Cities:
Atlanta SAT Math Tutors, Austin SAT Math Tutors, Boston SAT Math Tutors, Chicago SAT Math Tutors, Dallas Fort Worth SAT Math Tutors, Denver SAT Math Tutors, Houston SAT Math Tutors, Kansas City SAT Math Tutors, Los Angeles SAT Math Tutors, Miami SAT Math Tutors, New York City SAT Math Tutors, Philadelphia SAT Math Tutors, Phoenix SAT Math Tutors, San Diego SAT Math Tutors, San Francisco-Bay Area SAT Math Tutors, Seattle SAT Math Tutors, St. Louis SAT Math Tutors, Tucson SAT Math Tutors, Washington DC SAT Math Tutors
Popular Courses & Classes
MCAT Courses & Classes in San Diego, SSAT Courses & Classes in Phoenix, Spanish Courses & Classes in Phoenix, SSAT Courses & Classes in Seattle, ACT Courses & Classes in Boston, GMAT Courses & Classes in Phoenix, ISEE Courses & Classes in New York City, SAT Courses & Classes in Houston, GMAT Courses & Classes in Houston, ACT Courses & Classes in Denver
Popular Test Prep
SSAT Test Prep in Los Angeles, ACT Test Prep in Boston, SSAT Test Prep in Phoenix, LSAT Test Prep in New York City, GRE Test Prep in Los Angeles, ACT Test Prep in Dallas Fort Worth, ISEE Test Prep in Seattle, SAT Test Prep in Dallas Fort Worth, ACT Test Prep in Denver, GRE Test Prep in New York City