Hello from MrBillDoesMath!
Answer:
The first choice.
Discussion:
The question is equivalent to finding where y = 0 or solving
x^2 + 4x - 12 = 0.
Factors of -12 are 6 and -2 and 6 + -2 = 4x ( the coefficient of x). This means that
x^2 + 4x - 12 = (x+6)(x-2)
which equals zero when x = 6 or x = 2. That is the third choice.
Note that (-2, -16) is not a solution as its y value does not equal zero. For that reason the third choice (shown selected in the figure) is NOT correct.
Thank you,
MrB
