Exercise: Quadratic Equations
Discrete Quantitative Questions
- If 2x^2 + 20x = −48, then x could equal which of the following values?
A –12
B –8
C –7
D −4
E 0 - If a − b = 4, then a^2 − 2ab + b^2 =
A 2
B 8
C 12
D 16
E 20 - If (x + 3)^2 = 81, then x could equal which of the following?
A −15
B −12
C −9
D 3
E 9
For this question, write your answer in the box.- If x^2 − y^2 = 12, and x + y = 4, then what is the value of x?
- If (a + b)^2 = 36, and ab = 4, then a^2 + b^2 =
A 3
B 6
C 9
D 28
E 32
CHAPTER 11 ■ ALGEBRA 28703-GRE-Test-2018_173-312.indd 287 12/05/17 11:55 am