SOLUTION: if m^2 + n^2 = 18 and mn = 7, what is (m-n)^2?
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Question 1101321
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if m^2 + n^2 = 18 and mn = 7, what is (m-n)^2?
Answer by
ikleyn(52855)
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- 2mn = 18 - 2*7 = 4.
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