Question

Let f(x) = x2 - 8x + 5. Find f(-1).
help with this ?

Answer 1

Okay, plug in -1 in place of x.

Answer 2

Oh. This might seem complicated, but it's very simple, you see!

Look at f(x) and f(-1). The "x" represents the x-value and right now, they changes the x-value to -1. So you have to input -1 to all the xs.\[f(x)=x ^{2}-8x+5\]\[f(-1)=-1^{2}-8(-1)+5\]

Answer 3

Remember to use PEMDAS and do anything to both sides of the equation to keep the equation balanced. ;]

Answer 4

11 is required answer.