Question

How do you multiply `(x + 1)(x + 4)`?

Answer 1

`=color(blue)(x^2 + 5x +4`

Explanation:

`color(blue)((x+1))(x+4)`

`=color(blue)((x) ). (x+4) +color(blue)(1). (x+4)`

`=x^2 + 4x+x +4`
`=color(blue)(x^2 + 5x +4`