①3a(x-y)+9(y-x)②16mn^4-m③(x-y)³+9(x-y)+6(x-y)²④(x+2)(x+4)+2x²-5

①3a(x-y)+9(y-x)②16mn^4-m③(x-y)³+9(x-y)+6(x-y)²④(x+2)(x+4)+2x²-5 通分①x／3y与3x／2y²②x-y／2x+2y与(x-y)／(x+y)²③2mn／4m²-9与2m／2m+3 因式分解 （1）16m^3n^2-9mn^3 （2）4（x-y)^3-8x(x-y)^2 (3）10a(x-y)^2-5b(y-x)(4)-4(x-2y)^2+9(x+y)^2(5)(x^2-4x)^2+8(x^2-4x)+16 -16(2x+y)^2+25(x-2y)^24m^3-9mn^218(a-b)^3-8(a+2b)^2(a-b) 分解因式：①1/2a²b²+2+2ab②x³-4x③6(x-y)-9-(x-y)²④m²-2mn+n²-16 （1）.x^2-xy+x (2).m^2n-mn^2+mn (3).9x^3y^3-21x^3y^2+12x^2y^2 (4).x^2(x-y)+y^2(x-y)多项式因式分解 ①4a²-b²+3(2a-b) ②a²(x-y)+b²(y-x) ③ a³-2a²+a ④9m²n-3mn²因式分解题 14公式法求解.因式分解①（x²y²)²-4x²y²②5x²-2x+1/5③9(a-b)²+30(a-b)(a+b)+25(a+b)²④(x²-2x)²+2x(x-2)+1⑤2m²n²+8mn+8+x(mn+2)²⑥(a-b)²(3a-2)(2-3a)a²✿✿ (3x+9)(6x+8) (3x+7y)(3x-7y) (1/3a^2b^2)(-15a^2b^2) (3mn+1)(3mn-1)-8m^2n^2 (x+2)^2-(x+1)(x-1)(x+y+z)(x+y-z)(1)(3x+9)(6x+8) (2)(3x+7y)(3x-7y) (3) (1/3a^2b^2)(-15a^2b^2) (4)(3mn+1)(3mn-1)-8m^2n^2 (5) (x+2)^2-(x+1)(x-1) （6)（x+y+z)（x+y-z） 上面 因式分解：(x+y)^3(x-y)-(x+y)(x-y)^3,9x^2-16(a+b)^2 初二数学、快.要过程①.8m²n+2mn②.12xyz-9x²y²③.2a(y-z)-3b(z-y)④.p(a²+b²)-q(a²+b²) 整式的乘除和因式分解①2a²+a^8÷a^6②（-2ab）（-1/3a²b）+5ab×1/3a²b③（x-y+9）（x+y-9）④2011²-2008×2014⑤若（y+3）（y-2）=y²+my+n,求mn得值 约分分式 （1）x-y/-x+y （2）(x+y)^2/2(x+y)^3 （3）2mn/2m^2+4mn (4)2(a-b)^2/a^2-b^2(5)x^2+6xy+9y^2/x^2-9y^2 化简代数式的几道题3(x-1)-(x-5)2(x^2-y^2)-3(x^2-2y^2)(x+y)+3(x-y)-4(x+y-2)(2x^2-1+3x)-4(x-x^2+1)-3a^2+(3a-5a^2)-1/2(4a^2+6a)(8mn-3m^2)-5mn-2(3mn-2m^2)3(2x^2-y^2)-2(3y^2-2x^2)(8x^3-3x^2+3)-(9x^3-4x^2+5)-(-4ab+b^2)-2(2ab-b^2)辛苦了. (4x+5y)^2(2x-3)^2(-a+mn)^2 初一因式分解和计算分利用乘法公式计算1.（a^2-ab-b^2)(a^2+ab-b^2)2.(x^2y+2xy^2)(3x+6y)3.4^1005-2^2009/4^1004-2^2007因式分解1.12x^2y(3x-y)^3+4xy^2(y-3x)^32.(a^2+4b^2)^2-16a^2b^23.(m^2n^2-1)^2-6(mn+1)(mn-1)+9先化简,再求值（x 1）-2（-y+1)+3(2x+y-2)2)-2a`(a-b)3)(3a+2y)`4xy4)(-4m+3n)`(-2mn)5)(2a-b)(2a+b)6)(x-y)(x+2y)7)(x-3)(x+1)8)(-3x+y)(2X-y)9)(a+3b)(a-2b)10)-2x`(x-y)+3y(2x+y)11)(x-4y)(x+y)-(2x+3y)(x-y)可以的话就在加20 分解因式 4m^2(x+y)^2-12mn(x+y)(x-y)+9n^2(x-y)^2?