SOLUTION: f(x)=-3x^2+5x-1, find f(-2) A. -14 B. -3 C. -23 D. 23

Question 169787: f(x)=-3x^2+5x-1, find f(-2)
A. -14
B. -3
C. -23
D. 23
Found 2 solutions by jim_thompson5910, Alan3354:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Plug in .

Square to get .

Multiply and to get .

Multiply and to get .

Combine like terms.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
f(x)=-3x^2+5x-1, find f(-2)
A. -14
B. -3
C. -23
D. 23
-----------------
Sub -2 for x
f(x)=-3x^2+5x-1
f(-2) = -3*(-2)^2 + 5*(-2) -1
= -3*4 -10 -1
= -12 -10 -1
= -23
So it's C

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