Question

一道简单的数学题，各位帮忙啊

约分:(3x的平方—3y的平方)/(6x的平方+12xy+6y的平方)

Answer 1

3(x²-y²)/6（x²+2xy+y²）=（x+y）(x-y)/2(x+y)²=（x-y）/2（x+y）

Answer 2

3(x+y)(x-y)/6(x+y)2=(x-y)/2(x+y)

Answer 3

分子：X-Y
分母：2（X+Y）

Answer 4

泪伤157，你好！
解：（3x^2-3y^2)/(6x^2+12xy+6y^2)
=3(x+y)(x-y)/6(x+y)^2
=(x-y)/2(x+y)

Answer 5

(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)]