Question

What is the standard form of `y= ( x + 3)(x + 3)`?

Answer 1

`y=x^2+6x+9`

Explanation:

To bring it into standard form, we have to expand the whole thing. We'll use the distributive property: `(a+b)(c+d)=ab+ad+bc+bd` to expand it:
`y=(x+3)(x+3)`
`y=x^2+3x+3x+9`
`y=x^2+6x+9`