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If x2 + y2 = 29 and xy = 2, find the value ofx4 + y4 |
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Answer» We know that x2 + y2 = 29 Squaring both sides, we get (x2 + y2)2 = (29)2 x4 + y4 + 2x2y2 = 841 x4 + y4 + 2 (2)2 = 841 x4 + y4 = 841 – 8 x4 + y4 = 833 |
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