find the value of4xsquare+9ysquare if 2x+3y=18andxy=5
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4x2+9y2= (2x+3y)2 -2xy
=(18)2-2×5
=324-10
=314
=(18)2-2×5
=324-10
=314
Answered by
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(2x + 3y)^2 = 18^2
4x^2 + 9y^2 + 12xy = 324
xy= 5
4x^2 + 9y^2 = 264
4x^2 + 9y^2 + 12xy = 324
xy= 5
4x^2 + 9y^2 = 264
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