### Home > PC > Chapter 9 > Lesson 9.3.4 > Problem 9-147

9-147.

Solve:

Factor.

Simplify using identity.

Substitute:

Simplify.

Divide both sides by

Square root both sides.

Solve for .

9-147.

Solve:

Factor.

Simplify using identity.

Substitute:

Simplify.

Divide both sides by

Square root both sides.

Solve for .