计算;5a²b*(-2ab³)²,(2x²)³-3x四次方(x²-x)【(x-y)²+(x+y)(x-y)】/2x,(a+2b-1)(a-2b+1)
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计算;5a²b*(-2ab³)²,(2x²)³-3x四次方(x²-x)【(x-y)²+(x+y)(x-y)】/2x,(a+2b-1)(a-2b+1)
计算;5a²b*(-2ab³)²,(2x²)³-3x四次方(x²-x)
【(x-y)²+(x+y)(x-y)】/2x,(a+2b-1)(a-2b+1)
计算;5a²b*(-2ab³)²,(2x²)³-3x四次方(x²-x)【(x-y)²+(x+y)(x-y)】/2x,(a+2b-1)(a-2b+1)
5a²b*(-2ab³)²=5a²b×4a²b^6=20a^4b^7
(2x²)³-3x^4(x²-x)=8x^6-3x^6-3x^5=5x^6-3x^5=x^5×(5x-3)
【(x-y)²+(x+y)(x-y)】/2x
=(x²-2xy+y²+x²-y²)/2x
=(2x²-2xy)/2x
=x-y
(a+2b-1)(a-2b+1)
=a²-(2b-1)²=a²-4b²+4b-1