7y(x-3y)^2-2(3y-x)^3.帮忙做一下,偶不是很确定我的答案是对的
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7y(x-3y)^2-2(3y-x)^3.帮忙做一下,偶不是很确定我的答案是对的7y(x-3y)^2-2(3y-x)^3.帮忙做一下,偶不是很确定我的答案是对的7y(x-3y)^2-2(3y-x)^3
7y(x-3y)^2-2(3y-x)^3.帮忙做一下,偶不是很确定我的答案是对的
7y(x-3y)^2-2(3y-x)^3.
帮忙做一下,偶不是很确定我的答案是对的
7y(x-3y)^2-2(3y-x)^3.帮忙做一下,偶不是很确定我的答案是对的
你没说是做什么,我就当你问的是分解因式了.
7y(x-3y)^2 -2(3y-x)^3
=7y(x-3y)^2 +2(x-3y)^3
=(x-3y)^2 *[7y+2(x-3y)]
=(2x+y)(x-3y)^2
化简3(x-y)-7(x--y)+2(y-x)
2(x-y)²-3(x-y)(-y-x)
x(x-y)2-(y-x)3
[(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
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
(-7x^2-8y^2)*(-x^2+3y^2) (3x-2y)(y-3x)-(2x-y)(3x+y)
已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值
(-3x+7y)(-7y-3x)-(x-3y)(2x+3y)
[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
已知方程组{(X+Y)-3(X-Y)=7,2(X+Y)+(X-Y)=-7}则(X+Y)(X-Y)=
18(x+y)^8(x-y)^7÷[3(x+y)^3(x-y)^3]^2
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项.
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于