1.(2X+3Y+5)(2X+3Y—5)2.(X—2Y/2)²—(X+2Y/2)²
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1.(2X+3Y+5)(2X+3Y—5)2.(X—2Y/2)²—(X+2Y/2)²1.(2X+3Y+5)(2X+3Y—5)2.(X—2Y/2)²—(X+2Y/2)&sup
1.(2X+3Y+5)(2X+3Y—5)2.(X—2Y/2)²—(X+2Y/2)²
1.(2X+3Y+5)(2X+3Y—5)
2.(X—2Y/2)²—(X+2Y/2)²
1.(2X+3Y+5)(2X+3Y—5)2.(X—2Y/2)²—(X+2Y/2)²
1.(2X+3Y+5)(2X+3Y—5)=(2X+3Y)^2-5^2=4X^2+12XY+9Y^2-25
2.(X—2Y/2)²—(X+2Y/2)² =(X—2Y/2+X+2Y/2)(X—2Y/2-X+2Y/2)
=X*-2Y=-2XY
平方差,,,。(《2X+3Y》+5)(《2X+3Y》—5)
看做一个数,,然后再做
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
初一计算题(请写清楚步骤)1.(x+5)(x+5)-(x-2)(x-3)2.(2x-y)(2x-y)-4(x-y)(x+2y)3.(x+y+z)(x-y+z)
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
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}
化简:5(x-y)+2(x+y)-3(x-y)
2(x-y)²-3(x-y)(-y-x)
1.(2x-3y)(2x+3y)=2.(5x+3y)(3y-5x)3.(x-3y)(-x+3y)=4.(x+y-z)²=
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
1.(X+Y)/2【原本应是二分之X+Y的但我不会打分号】+(X-Y)/3=64(x+y)-5(x-y)=22.X+2Y=12X-3Y=2
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(5x+2y)(3x-2y)
(5x-3y)(2x+2y)