1、(4x²y-2x³)÷(-2x)²2、【(x-y)²+(x+y)(x-y)】÷2x
问题描述:
1、(4x²y-2x³)÷(-2x)²
2、【(x-y)²+(x+y)(x-y)】÷2x
答
1、(4x²y-2x³)÷(-2x)²
=(4x²y-2x³)÷4x²
=y-1/2x
2、【(x-y)²+(x+y)(x-y)】÷2x
=【(x²+y²-2xy+x²-y²】÷2x
=【2x²-2xy】÷2x
=x-y
答
(1)
(4x²y-2x³)÷(-2x)²
原式=4x²y÷(-2x)²-2x³÷(-2x)²
=4x²y÷4x²-2x³÷4x²
=xy - 0.5x
(2)
【(x-y)²+(x+y)(x-y)】÷2x
原式=【x²-2xy+y²+x²-y²】÷2x
=【2x²-2xy】÷2x
=2x²÷2x-2xy÷2x
=x-y
——沫__心涵