〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3
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〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3
〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3
〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3
〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y
=〖(9x^2-y^2)-9(x-2y)∧2〗÷3y
=〖(36-9)-9(-8)∧2〗÷9
=〖27-9x64〗÷9
=〖3-64〗
=-61
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12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
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(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
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3x(x-2y)+(x+2y)(2x-y)-3y(y-2x)
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1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2}
4x^-9y^-(2x+3y)
-3(x-y)(x-y)+3(x-y)
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
(x-y)/(x+3y)*(x²+6xy+9y²)/(x²-y²)-2y/(x+y)
计算或化简:[(x-y)/(x+3y)]÷[(x²-y²)/(x²+6xy+9y²)]-(2y)/x+y
化简:(x+y)+(2x+y/1*2)+(3x+y/2*3)+...+(9x+y/8*9)
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9