If 2x + y = 14 and xy = 6 find the value Of 4xsquare + y square
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Given 4x2 + y2 = 40 and xy = 6 Consider (2x + y)2 = 4x2 + y2 + 4xy = 40 + 4(6) = 64 Therefore, (2x + y) = ± 8
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