Question

What is the standard form of `y= (x+2)(4x+10)-x^2-5x`?

Answer 1

`3x^2+13x+20`

Explanation:

expanding `(x+2)(4x+10)=4x^2+18x+20`
and adding `-x^2-5x`
we get
`3x^2+13x+20`