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Let a and b be real numbers such that a+b=-1 and a-b=2. Compute a^2-b^2.

 Jun 25, 2022
 #1
avatar+2275 
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Recall that \(a^2 - b^2 = (a-b)(a+b)\)

 

Can you take it from here?

 Jun 25, 2022

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