Question

Given the polynomial function below, find F(-5).

F(x) = x2 - 2x - 7

A. -42
B. 8
C. 28
D. -22

Answer 1

substitute -5 for x and solve

Answer 2

f(-5)=(-5)^2-2*(-5)-7=?

Answer 3

is it D. -22

Answer 4

no

Answer 5

(-5)^2-2*(-5)-7=5^2+10-7=25+10-7=?

Answer 6

-*-=+
(-)^2=+^2

Answer 7

wait is it A. -42

Answer 8

no

Answer 9

i horrible at algebra

Answer 10

well look:
(-5)^2-2*(-5)-7=5^2+10-7=25+10-7=?

can you simplify this?

Answer 11

C. 28

Answer 12

yes