化简 (3x-4y)(3x+4y)-(5x-2y)的2次方
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化简 (3x-4y)(3x+4y)-(5x-2y)的2次方
化简 (3x-4y)(3x+4y)-(5x-2y)的2次方
化简 (3x-4y)(3x+4y)-(5x-2y)的2次方
(3x-4y)(3x+4y)-(5x-2y)的2次方
=9x²-16y²-25x²+20xy-4y²
=-16x²+20xy-20y²
=-4(4x²-5xy+5y²)
9x²-16y²-(25x²+4y²-20xy)
=-16x²-20y²+20xy
-16x²+20xy-20y²
(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
[(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)
(4x-3y)-[(-13y-x)+(x-y)]-5x
化简(x+5y)(x+4y)-(x-5y)(x+5y)其中x=3y=﹣三分之一
把(x+y)、(x-y)看作整体,进行合并同类项;3(x-y)-4(x+y)+5(x-y)-(x+y).
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
化简(x-y)-4(2x-3y)
(x-4y)分之(3x)+(4y-x)分之(x+y)-(x-4y)分之(7y)
合并同类项3(x-y)^4-(2(x-y)^4-5(X-Y)^4)-(X-Y)^4合并同类项3(x-y)^4-(2(x-y)^4-5(X-Y)^4)-(X-Y)^4
化简,亲快啊啊急!(3x-2y)(7x-y)-(4x+3y)(x-y)
计算:(3x+4y)(3x-4y)-5(x+y)(x-2y)
-(5x+y)-7(x-y) -2分之1(x+y)+4分之1(x+2y) 4x-2(x-2) -2x-(3x-1) x-(5x-2y)+2(2x-y)
x+2y=3(x+y)+5 3x-4y=4(x+y)-15
平法差公式计算 (5x+3y)(3y-5x)-(4x-y)(4y+x)