Question

How do you factor `15- r ^ { 2} - 2r`?

Answer 1

See the entire solution process below:

Explanation:

First, rewrite the expression in standard form:

`-r^2 - 2r + 15`

Because `3 - 5 = -2` and `3 xx 5 = 15` we can factor this expression as:

`(-r + 3)(r + 5)`