(-2x²y)³+8(x²)²×(-x²)×(-y)³ 怎么做?
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(-2x²y)³+8(x²)²×(-x²)×(-y)³怎么做?(-2x²y)³+8(x²)²×(-x
(-2x²y)³+8(x²)²×(-x²)×(-y)³ 怎么做?
(-2x²y)³+8(x²)²×(-x²)×(-y)³ 怎么做?
(-2x²y)³+8(x²)²×(-x²)×(-y)³ 怎么做?
(-2x²y)³+8(x²)²×(-x²)×(-y)³
=-8x^6y³+8x^4×(-x²)×(-y³)
=-8x^6y³+8x^4×x²×y³
=-8x^6y³+8x^6y³
=0
(-2x²y)³+8(x²)²×(-x²)×(-y)³=-8x^6y³+8x^6y³=0
(-2x²y)³+8(x²)²×(-x²)×(-y)³
=-8x^6y^3+8x^6y^3
=0