If x-y = lo and xy = -2, then find x² + y²
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96
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(x-y) ^2=(10) ^2
x^2 + y^2 - 2xy = 100
x^2 + y^2 -2×(-2) = 100 (xy) = -2
x^2 + y^2 + 4 = 100
x^2 + y^2 = 100- 4
x^2 + y^2 = 96
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