1、(2x-5y) (4x-2y) 2、6a(a-4)-(2a-3)(3a+1) 3、(a-1)(a²+a+1)
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1、(2x-5y) (4x-2y) 2、6a(a-4)-(2a-3)(3a+1) 3、(a-1)(a²+a+1)
1、(2x-5y) (4x-2y) 2、6a(a-4)-(2a-3)(3a+1) 3、(a-1)(a²+a+1)
1、(2x-5y) (4x-2y) 2、6a(a-4)-(2a-3)(3a+1) 3、(a-1)(a²+a+1)
解
(2x-5y)(4x-2y)
=8x²-4xy-20xy+10y²
=8x²-24xy+10y²
6a(a-4)-(2a-3)(3a+1)
=6a²-24a-(6a²+2a-9a-3)
=(6a²-6a²)+(-24a+7a)+3
=-17a+3
(a-1)(a²+a+1)
=a³+a²+a-a²-a-1
=a³-1
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
4x+2y-5x-y
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y
[(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x
(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算
把4(x-y+1)+y(y-2x)因式分解
y(y+2)+4x(x-y-1)因式分解是多少
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
x*x+2x+y*y-4y+5=0 x= y=
5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解
5x^3y(x-y)^3-10x^4y^3(y-x)^2