Question

How do you multiply `3x(x+9)`?

Answer 1

`= color(green)(3x^2 + 27x`

Explanation:

`color(green)( 3x)(x+9)`

Here `color(green)(3x)` needs to be multiplied with each term within brackets:

`= color(green)(3x) . (x) + color(green)(3x) . (9)`
`= color(green)(3x^2 + 27x`