express y=(x-2)^(2)+4 in standard form

Question

a. y=x^(2)-4x+4

b. y=x^(2)-4x+8

c. y=x^(2)-4x

d. y=x^(2)+4x+4

 

Answer 1

First do the expansion of (x-2)^2 which yields x^2 -4x+4. Then add the other 4 to get:

b. y=x^2-4x+8