计算: (1)x²•x³+x^7∕x² (2)[(x-y)²+(x+y)(x-y)]∕2x 要详细过程
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回答问题了再采纳
帮忙回答一下:http://zhidao.baidu.com/question/540280557?quesup2&oldq=1
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帮忙回答一下:http://zhidao.baidu.com/question/540280557?quesup2&oldq=1
http://zhidao.baidu.com/question/540279590?quesup2&oldq=1 展开
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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
=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
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(1) 2x^6
(2) =(x²+y²-2xy+x²-y²)/2x
=(2x²-2xy)/2x
=x-y
(2) =(x²+y²-2xy+x²-y²)/2x
=(2x²-2xy)/2x
=x-y
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