Algebra-1

First, factor the quadratic trinomial -x² + 9x - 14.

We can rewrite it as -(x² - 9x + 14).

Now factor x² - 9x + 14. We need to find two numbers that multiply to 14 and add up to -9.

The factors of 14are: 1, 2, 7 and 14.

We need to find two numbers whose sum is -9. The numbers are -2 and -7 because ...