[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 18:04:28
[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2x
x=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2x
=[(x^2-2xy+y^2+x^2-y^2]/2x
=x-y
=4.5
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 18:04:28
[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2x
x=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
[(x-y)²+(x+y)(x-y)]/2x
=[(x^2-2xy+y^2+x^2-y^2]/2x
=x-y
=4.5