Question

How do you multiply `(7z+6)(3z+3)`?

Answer 1

`=color(blue)(21z^2 + 39z +18`

Explanation:

`color(blue)( (7z+6))(3z+3)`

`=color(blue)( (7z))(3z) + color(blue)( (7z))(3) +color(blue)(6)(3z) + color(blue)(6)(3)`

`=21z^2 + 21z + 18z +18`
`=color(blue)(21z^2 + 39z +18`