(x+2y)(3x^2+4y^2)-(x+2y)^2(x+2y) )
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(x+2y)(3x^2+4y^2)-(x+2y)^2(x+2y) )
RT
这才是对的!
(x+2y)(3*x^2+4*y^2)-(x+2y)^2 *(x-2y)
RT
这才是对的!
(x+2y)(3*x^2+4*y^2)-(x+2y)^2 *(x-2y)
是分解因式嘛
(x+2y)(3x²+4y²)-(x+2y)² ×(x+2y)
=(x+2y)[(3x²+4y²)-(x+2y)²]
=(x+2y)[3x²+4y²-(x²+4xy+y²)]
=(x+2y)(3x²+4y²-x²-4xy-4y²)
=(x+2y)(2x²-4xy)
=2x³-4x²y+4x²y-8xy²
=2x³-8xy²
=2x(x²-4y²)
=2x(x-2y)(x+2y)
(x+2y)(3x²+4y²)-(x+2y)² ×(x+2y)
=(x+2y)[(3x²+4y²)-(x+2y)²]
=(x+2y)[3x²+4y²-(x²+4xy+y²)]
=(x+2y)(3x²+4y²-x²-4xy-4y²)
=(x+2y)(2x²-4xy)
=2x³-4x²y+4x²y-8xy²
=2x³-8xy²
=2x(x²-4y²)
=2x(x-2y)(x+2y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
1、x(x-y)(x+y)-x(x+y)^2
(x+3y-4)(2x-y)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
(2x-y)^2-4(x-y)(x+2y)