expand (x+ 2y)² (3x-5y)³
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[x2+2y2+2*x*2y] [3x2+5y2-2*3x-5y]
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Answer:
(a+b)2 =a2+2ab+b2
(a-b)3=a3-b3-3ab(a-b)
(x2+2(x×2y)+4y2) (9x3-125y3-3(3x×(-5y)(3x-2y) )
(x2+4xy+4y2) (9x3-125y3-(-45xy(3x-2y) )
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