(1)x^6+64y^6+12x^2y^2-1(2)4m^2-14mx+49nx-14mn(3)a^2b^2c-ab^3c+a^2bc^2-ab^2c^2(4)x^5-x^3-x^2-1(5)1+a+b+c+ab+bc+ac+abc(6)ab(c^2-d^2)-cd(a^2-b^2)(7)(x^2+1)^2-x^2+x(x-2)(x^2+x+1)
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【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
[12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y)
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
因式分解:x^2 -12xy+36y^2 - x + 6y (x-6y)(x-6y-1)
解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
(1)x^2*x^8+x^13/x^3 (2)a^19/a^12/a^3 (3) (x-2y)^5/(2y-x)^3 (4)(x-y)^5/(x-y) (5)(x-y)^6/(y-x)^4
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
计算:(x-y)^2*(y-x)^2*(x-y)^6
6(x+y)2-2(x-y)(x+y)因式分解
先化简后求值:3(-2x-x²y)-12x²y-(6y-9x²y+1).其中x与y互为相反数.
化简求值:(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.(10x+1/90y) ,其中x=1,y=-2
(x+y)^2+6(x+y)+9
(x+y)(x-y)+(x-y)^2-(6x^2×y÷2y-2xy^2÷2y)其中x=-3,y=1/3
1 (-6x+y)(-6x-y) 2 (-6x+y)(6x-y) 3(-6x+y)(x-6y)
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1