(3x^3y^2+6x^2y^3)/(x+2y)(-9m^2+4n^2)/(3m+2n)(4a^2-20ab+25b^2)/(5b-2a)(1-16a^4)/(4a^2+1)/(2a+1)

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(3x^3y^2+6x^2y^3)/(x+2y)(-9m^2+4n^2)/(3m+2n)(4a^2-20ab+25b^2)/(5b-2a)(1-16a^4)/(4a^2+1)/(2a+1)(3x^3y

(3x^3y^2+6x^2y^3)/(x+2y)(-9m^2+4n^2)/(3m+2n)(4a^2-20ab+25b^2)/(5b-2a)(1-16a^4)/(4a^2+1)/(2a+1)
(3x^3y^2+6x^2y^3)/(x+2y)
(-9m^2+4n^2)/(3m+2n)
(4a^2-20ab+25b^2)/(5b-2a)
(1-16a^4)/(4a^2+1)/(2a+1)

(3x^3y^2+6x^2y^3)/(x+2y)(-9m^2+4n^2)/(3m+2n)(4a^2-20ab+25b^2)/(5b-2a)(1-16a^4)/(4a^2+1)/(2a+1)
(1)
(3x^3y^2+6x^2y^3)/(x+2y) (分子提出公因子 3x^2y^2)
=3x^2y^2(x+2y)/(x+2y)
=3x^2y^2
(2)
(-9m^2+4n^2)/(3m+2n) (分子用平方差公式)
=(2n+3m)(2n-3m)/(3m+2n)
=2n-3m
(3)
(4a^2-20ab+25b^2)/(5b-2a) (分子用完全平方公式)
=(2a-5b)^2/(5b-2a)
=(5b-2a)^2/(5b-2a)
=5b-2a
(4)
(1-16a^4)/(4a^2+1)/(2a+1) (对 1-16a^4 用平方差公式)
=(1+4a^2)(1-4a^2)/[(4a^2+1)(2a+1)]
=(1-4a^2)/(2a+1) (再对 1-4a^2 用平方差公式)
=(1+2a)(1-2a)/(2a+1)
=1-2a

3x^2y^2(x+2y)/(x+2y)=3x^2y^2
=(2n)^2-(3m)^2/(3m+2n)
=(2n+3m)(2n-3m)/(3m+2n)
=(2n-3m)
=(5b-2a)^2/(5b-2a)
=5b-2a
=(1-4a^2)(1+4a^2)/[(4a^2+1)(2a+1)]
=(1-2a)(1+2a)/(2a+1)
=1-2a

x(x-y)2-(y-x)3 因式分解3x^2(x-y)+6x(y-x) [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 [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 计算：x+2y/x-y+2x/y-x-3y/x-y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 2(2x+3y)(3x+2y)-(6x-y)(2x-5y) x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 [12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y)