Question

What is the standard form of `y= (-2x+2)^2 + 5x^2+3x`?

Answer 1

`9x^2 - 5x + 4`

Explanation:

Distribute the brackets using FOIL and collect 'like terms'.

`y = (-2x+2)(-2x+2) + 5x^2 + 3x`

`= 4x^2 - 4x -4x + 4 + 5x^2 + 3x`

hence `y = 9x^2 - 5x +4`