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| Math Central | Quandaries & Queries |
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Question from Yumiko, a student: Solve the following pair of simultaneous equations. x^2 -4x = y^2-4 |
Yumiko,
Solve the second equation for y and substitute into the first equation to get
Expand the right side, multiply both sides by 9 to clear the fractions, simplify and factor.
Penny
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