约分:(3x的平方—3y的平方)/(6x的平方+12xy+6y的平方)
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约分:(3x的平方—3y的平方)/(6x的平方+12xy+6y的平方)
约分:(3x的平方—3y的平方)/(6x的平方+12xy+6y的平方)
约分:(3x的平方—3y的平方)/(6x的平方+12xy+6y的平方)
3(x²-y²)/6(x²+2xy+y²)=(x+y)(x-y)/2(x+y)²=(x-y)/2(x+y)
分子:X-Y
分母:2(X+Y)
3(x+y)(x-y)/6(x+y)2=(x-y)/2(x+y)
泪伤157,你好!
(3x^2-3y^2)/(6x^2+12xy+6y^2)
=3(x+y)(x-y)/6(x+y)^2
=(x-y)/2(x+y)
(3x^2-3y^2)/(6x^2+12xy+6y^2)
=3(x^2-y^2)/[6(x^2+2xy+y^2)]
=(x^2-y^2)/[2(x^2+2xy+y^2)]
=(x-y)(x+y)/[2(x+y)^2]
=(x-y)/[2(x+y)]