true or false?

Question

By completing the Square we can change any quadratic function of the form y=ax^+bx+c into a quadratic function in vertex form

Answer 1

true
y = ax^2 + bx + c
y = a(x^2 + (b/a)x + c/a)
y = a(x^2 + (b/a)x + (b/2a)^2 - (b/2a)^2 + c/a)
y = a(x + b/2a)^2 - a(b/2a)^2 + c
y + a(b/2a)^2 - c = a(x + b/2a)^2
(y + b^2/4a - c) = a(x + b/2a)^2

Answer 2

false

Answer 3

false...... i think

Answer 4

true.. i am sure.