Question

F(x) = - 3x ^ 2 + 3x + 7 Find f(8)

Answer 1

f(8)= -161

Explanation:

fill in 8 into x, so the equation becomes

f(8)=-3(8)^2+3(8)+7

f(8)=-3(64)+24+7

f(8)=-192+31

f(8)=-161

Answer 2

f(8) = -161

Explanation:

Plugin 8 to each x value to get to this equation, -3(8)^2 + 3(8) + 7. Once you have done that, make sure to multiply 8 to the second power and by 3 separately to get to this equation -3(64) + 24 + 7. Combine 24 and 7 together to get 31 and multiply 64 by -3 to get -192. Add 31 now to get -161 as your answer.