Question

How do you simplify `(5 + x)(3 - 2x)`?

Answer 1

`-2x^2-7x+15`

Explanation:

To simplify to binomials you multiply each term from one set of parentheses by all the terms in the next. So...
`5*3 = 15`
`5*(-2x) = -10x`

`x*3 = 3x`
`x*(-2x) = -2x^2`

Then you combine all the like terms which in this case is `-10x` and `3x` leaving you with `-2x^2-7x+15` (normally you order by the greatest coefficient)