Algebra-1

First, factor the quadratic trinomial -x² - 2x + 8.

We can rewrite it as -(x² + 2x - 8).

Now factor x² + 2x - 8. We need to find two numbers that multiply to -8 and add up to 2.

The factors of 8 are: 1, 2, 4 and 8.

We need to find two numbers whose sum is 2. The numbers are -2 and 4 becaus...