# How do you solve #y=-x^2-6x-3, y=6# using substitution?

##### 2 Answers

#### Explanation:

To solve for

Multiply both sides by

Add 6 to both sides:

Factor the equation by calculating factors of the first and last numbers that will add or subtract to arrive at the inner number.

In this case both factors will provide the same answer for

To check, substitute

#### Explanation:

substitute

multiply both sides by

Check:

substitute