Question

Am I doing this right?

Answer 1

f(x) = 2x^2 − 8x + 5

Line 1: f(x) = 2(x − 8x) + 5
Line 2: f(x) = 2(x − 8x + 16) + 5 − 16
Line 3: f(x) = 3(x − 4)2 − 11

Answer 2

@mathmale

Answer 3

f(x)=(2x^2-8x+5+1)-1
f(x)=(2x^2-8x+6)-1

Answer 4

then solve the paranthesis
2x^2-8x+6=(2x-2)(x-3)

Answer 5

So the first step I made completing this square was wrong?