यदि x+y=-4,तब x^3+y^3-12xy+64का मान ज्ञात कीजिए
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(x+y)³ = -4³ = -64
hence, x³+y³+3xy(x+y)= -64
x³+y³+3xy(-4)=-64[putting x=4(given)]
x³+y³-12xy+64=0
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