Home » Test Prep » PSAT Test » Factor the following trinomial:
Factor the following trinomial:
x2 – x – 12
A. (x – 6)(x + 2)
B. (x – 3)(x – 4)
C. (x + 4)2(x – 3)
D. (x – 1)(x – 12)
E. (x + 3)(x – 4)
Correct Answer: E
Explanation/Reference:
Explanation:
x2 – x – 12 To trinomial is in ax + bx + c form In order to factor, find two numbers whose product is c, in this case -12, and whose sum is b, in this case -1 Factors of -12:
-1,12;1,-12;-3,4;3,-4;-2,6;2,-6 Which of these pairs has a sum of -1?
3 and -4 Therefore the factored form of x2 – x – 12 is:
(x + 3)(x – 4)
Download Printable PDF. VALID exam to help you PASS.
|
|