Pre-Algebra Examples

Simplify (x-y)/(x+y)-(x+y)/(x-y)
Step 1
To write as a fraction with a common denominator, multiply by .
Step 2
To write as a fraction with a common denominator, multiply by .
Step 3
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Step 3.1
Multiply by .
Step 3.2
Multiply by .
Step 3.3
Reorder the factors of .
Step 4
Combine the numerators over the common denominator.
Step 5
Simplify the numerator.
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Step 5.1
Raise to the power of .
Step 5.2
Raise to the power of .
Step 5.3
Use the power rule to combine exponents.
Step 5.4
Add and .
Step 5.5
Rewrite as .
Step 5.6
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 5.7
Simplify.
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Step 5.7.1
Add and .
Step 5.7.2
Add and .
Step 5.7.3
Add and .
Step 5.7.4
Apply the distributive property.
Step 5.7.5
Subtract from .
Step 5.7.6
Add and .
Step 5.7.7
Subtract from .
Step 5.7.8
Multiply by .
Step 6
Move the negative in front of the fraction.