Answer:
395
You are 100% right! You go!
Step-by-step explanation:
We are given f(x)=5x^2-2x+8 and are asked to find the value of the function at x=9.
So replace x with (9):
f(9)=5(9)^2-2(9)+8
f(9)=5(81)-18+8 I did the exponent 9^2 and 2(9) in this step:
f(9)=405-18+8 I did 5(81) in this step
f(9)=405-10 I did -18+8 in this step
f(9)=395
