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Home > PC > Chapter 4 > Lesson 4.1.2 > Problem 4-30


Write with one common denominator.

Substitute y2 with 1 − x2 from the given equation.


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.

1. Multiply out.
2. Make all fractions with the same common denominator.
3. Simplify.