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If x-y=10 and x+y=20 what is the answer for x^2-y^2?

If x-y=10 and x+y=20 what is the answer for x^2-y^2?
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If x-y=10 and x+y=20 what is the answer for x^2-y^2?

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User Max Ehrlich
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1 Answer

5 votes
200 because 15 - 5 is 10 and 15+5 is 20. so 15 squared is 225 and 5 squared is 25 and 225-25 is 200
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User Quodlibetor
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