(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方 就是小2
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(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方就是小2(X-3Y)(X+3Y)-(X+2Y)(X-4Y
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方 就是小2
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方 就是小2
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方 就是小2
原式=X²-9Y²-(X²-2XY-4Y²)-(4X²-4XY+Y²)
=X²-9Y²-X²+2XY+4Y²-4X²+4XY-Y²
=-4X²+6XY-6Y²
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原式=X²-9Y²-X²+2XY+4Y²-4X²+4XY-Y²
=-4X²+6XY-6Y²
(x2-9y2)-(x2-4xy+2xy-8x2)-(4x2-2xy+y2)自行化减
2(x-y)²-3(x-y)(-y-x)
x(x-y)2-(y-x)3
[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
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
[(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
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
计算(x-y)^2×(x-y)^3×(y-x)×(y-x)^2
(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,
(3x-y)(3y+x)-(x-y)(x+y)
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
3x(x-2y)+(x+2y)(2x-y)-3y(y-2x)