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Compute the value of 9x2 + 4y2 if xy = 6 and 3x + 2y = 12 |
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Answer» ONG>Answer: xy=6, (3x+2y)^2 =12^2 =9X^2+4y^2+12xy=144, ie, 9x^2+4y^2+(12×6)=144 =9x^2+4y^2+72=144, 9x^2+4y^2=144-72 =72. Finally your answer will be 72 as well as the value of 9x SQUARE + 4y square is 72. |
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