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Given that x+y= 7/10 and x-y= 5/14*(x + y), find the value of x^2-y^2, expressed as a common fraction.

 Dec 31, 2021
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(x+y)(x-y) = 7/10 * 5/14 (7/10)

x^2 +y^2   = 245/1400 = 7/40

 Dec 31, 2021

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