Question

Given the function rule f(x) = x^2 - 3x + 2, what is the output of f(-2)?
Choices:
A - -8
B - 0
C - 4
D - 12
I selected B - 0. That is wrong. The correct answer is D - 12. How do you get this?

Answer 1

f(x) = x^2 - 3x + 2

f(4) = (4)^2 - 3(4) + 2= 16-12+2 = 6

f(-2) = ?

Answer 2

plug in -2, just like I plugged in 4

Answer 3

ok. just a sec.

Answer 4

sure

Answer 5

Am I right?
f(-2) = -2^2 = 4
4 - (3 * -2) = 4 - (-6) = 10 + 2 = 4

Answer 6

I meant 10 + 2 = 12 sorry

Answer 7

yeah, 12 is right

Answer 8

thanks so much!

Answer 9

My pleasure !