Question

Factor the expression:
x^2 - 4x - 12
a. (x-6)(x-2)
b. (x-4)(x-3)
c. (x-6)(x+2)
d. (x-4)(x+3)
What is the solution of the equation?
x - 2 = 29

a. -27
b. -31
c. 31
d. 27

Answer 1

your first question, the answer is D. x * x = x^2, -4 * x = -4x and -4 * 3 = 12 using the distributive property. Don't forget you are multiplying negative and positives.

the second question, isolate x by adding 2 to both sides. x=31. by adding 2 on the left, it cancels out to 0 leaving x by itself. What you do to one side you do to the other. So 29+2 equals 31. answer is C.