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If x minus y is equal to 7 and x y is equal to 9 find the value of x square + y square |
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Answer» x-y=7 squaring both SIDE (x-y)²=7² x²+y² - 2 x 9 =49 x²+y² - 18= 49 x²+y² = 49 + 18 x²+y² = 67 |
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