Algebra-1

First, factor the quadratic trinomial -x² + 6x - 9.

We can rewrite it as -(x² - 6x + 9).

Now factor x² - 6x + 9. We need to find two numbers that multiply to 9 and add up to -6.

The factors of 9 are: 1, 3 and 9.

We need to find two numbers whose sum is -6. The numbers are -3 and -3 because (...