x^2-9y^2-x-3y... 做错的 帮下
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x^2-9y^2-x-3y... 做错的 帮下
x^2-9y^2-x-3y
... 做错的 帮下
x^2-9y^2-x-3y... 做错的 帮下
x^2-9y^2-x-3y=(x+3y)(x-3y)-(x+3y)=(x+3y)(x-3y-1)
x^2-9y^2-x-3y... 做错的 帮下
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已知2x-y/x+2y=3,求2(2x-y)/x+2y-9(x+2y)/2x-y+3的值.
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
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[(x+2y)(x-2y)-(2x-y)²+(3x-y(2x-5y)]/(-x)的解答
(x+3y)的平方+2(x-y)(x+y)+(x-3y)的平方
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请帮我看看我那里做错了!y=[x^2*(三次根号下x^2)]/根号下x^5=x^(8/3)/x^(5/2)
y=3(x-y),x=2(x-y)求x,y的值
x(x-y)2-(y-x)3
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(x+3y)(x-3y)(x的2次方-9y的2次方)
已知:x+9y=y-3x,求(x^2-y^2)/(x^2+y^2)的值RT
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2