Question

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

Answer 1

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

Explanation:

`(x+3)^3`
`color(white)(aaaaaaaaaaaaa)` `x+3`
`color(white)(aaaaaaaaaaa)` `xx underline(x+3)`
`color(white)(aaaaaaaaaaaaa)` `x^2+3x`
`color(white)(aaaaaaaaaaaaaaaaaa)` `3x+9`
`color(white)(aaaaaaaaaaaaa)` `overline(x^2+6x+9)`
`color(white)(aaaaaaaaaaa)` `xx x+3`
`color(white)(aaaaaaaaaaaaa)` `overline(x^3+6x^2+9x)`
`color(white)(aaaaaaaaaaaaaaaaa)` `3x^2+18x+27`
`color(white)(aaaaaaaaaaaaa)` `overline(x^3+9x^2+27x+27)`

`color(white)(aaaaaaaaaaaaa)` `color(green)(x^3+9x^2+27x+27`