### Home > PC3 > Chapter 7 > Lesson 7.1.2 > Problem 7-28

7-28.

Given , simplify each of the following expressions. Homework Help ✎

Rewrite the expression with a common denominator.

Substitute

*y*^{2}with 1 −*x*^{2}from the given equation.Simplify.

Rewrite the expression with a common denominator.

Substitute from the given equation.

Rewrite the expression in the numerator with a common denominator.

Simplify and substitute.

Multiply out.

Make all fractions with the same common denominator.

Simplify.