Question

How do you factor `-x^2-2x+63`?

Answer 1

`-x^2-2x+63=-(x-7)(x+9)`

Explanation:

`-x^2-2x+63`

Factor out the negative sign.

`-(x^2+2x-63)`

Find two numbers that multiply to `63` and add to `2`.

The numbers `-7` and `9` fit the criteria.

The factors are `-(x-7)(x+9)`.