分解 (x³)²+64(y³)²+12x²y²-1
2个回答
2010-10-07
展开全部
x³ +6xy+y³
=(x+y)(x^2-xy+y^2)+6xy
=2(x^2-xy+y^2)+6xy
=2(x^2+2xy+y^2)
=2(x+y)^2
=8.
=(x+y)(x^2-xy+y^2)+6xy
=2(x^2-xy+y^2)+6xy
=2(x^2+2xy+y^2)
=2(x+y)^2
=8.
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