作业帮(x+y)(x-y)-(2x+y)(x-y+1)计算要过程
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(x+y)(x-y)-(2x+y)(x-y+1)计算要过程
(x+y)(x-y)-(2x+y)(x-y+1)计算要过程
(x+y)(x-y)-(2x+y)(x-y+1)计算要过程
(x+y)(x-y)-(2x+y)(x-y+1)
=x^2-y^2-(2x^2-2xy+2x+xy-y^2+y)
=x^2-y^2-2x^2+2xy-2x-xy+y^2-y
=-x^2+xy-2x-y
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计算什么
=x平方+xy-xy-y平方-2x平方+2xy-2x-xy+y平方-y
=x平方--2x平方-y平方+y平方-2xy-xy-2x-y
=-x平方-3xy-2x-y
=-(x平方+3xy+2x+y)
=(x+y)(x-y)-(2x+y)(x-y)-(2x+y)=-x(x-y)-2x-y=~~
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简y(x+y)+(x+y)(x-y)-x^2
{(x,y) |x|+|y|
x>y?x:y
因式分解x(x+y)(x-y)-x(x+y)^2
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
x^2(x-y)+(y-x)
x(x-y)2-(y-x)3
计算:y-x分之x+y+x-y分之y-y-x分之2x-y
[(x-y)^2-(x+2y)(x-2y)]/y
【(x-y)^2+(x+y)(x-y)】除以 2x
[(x-y)²+(x+y)(x-y)]除以2x
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
x^/y-x-y^/y-x化简.