Question

F(x) = 2x2 + 5x + 20 Find f(-9)

Answer 1

Answer: f(-9)=137

Step-by-step explanation:

To find f(-9), you plug in -9 into x.

f(-9)=2(-9)²+5(-9)+20                           [solve parenthesis]

f(-9)=2(81)-45+20                                 [multiply]

f(-9)=162-45+20                                   [subtract]

f(-9)=117+20                                          [add]

f(-9)=137

Answer 2

I got f(-9)= 4

Explanation
F(-9)= 2(-9)2+5(-9)+20
F(-9)=-36+20+20
F(-9)=4

I’m not 100% but that’s what I got