计算：(1)x²•x³+x^7∕x² (2)[(x-y)²+(x+y)(x-y)]∕2x

计算：(1)x²•x³+x^7∕x² (2)[(x-y)²+(x+y)(x-y)]∕2x
计算：(1)x²•x³+x^7∕x² (2)[(x-y)²+(x+y)(x-y)]∕2x

计算：(1)x²•x³+x^7∕x² (2)[(x-y)²+(x+y)(x-y)]∕2x
(1） 2x^6
（2） =（x²+y²-2xy+x²-y²）/2x
=（2x²-2xy）/2x
=x-y

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x²•x³+x^7/x²
=x^(2+3)+x^(7-2)
=x^5+x^5
=2x^5
[(x-y)²+(x+y)(x-y)]∕2x
=(x-y)[(x-y)+(x+y)]∕2x
=(x-y)(x-y+x+y)∕2x
=2x(x-y)∕2x
=x-y帮忙回答一下：http:...

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x²•x³+x^7/x²
=x^(2+3)+x^(7-2)
=x^5+x^5
=2x^5
[(x-y)²+(x+y)(x-y)]∕2x
=(x-y)[(x-y)+(x+y)]∕2x
=(x-y)(x-y+x+y)∕2x
=2x(x-y)∕2x
=x-y

收起