2x^2-(x-2)(x+3)=
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2x^2-(x-2)(x+3)=
(m+2n)(2m+n)-(3m-n)(m+2n)=
(x-y)(5x-3y+4z)=
(x-5)(x+4)=
(y-1)(y+3)=
先化简,再求值
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2
(m+2n)(2m+n)-(3m-n)(m+2n)=
(x-y)(5x-3y+4z)=
(x-5)(x+4)=
(y-1)(y+3)=
先化简,再求值
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2
![2x^2-(x-2)(x+3)=](/uploads/image/z/18491675-59-5.jpg?t=2x%5E2-%28x-2%29%28x%2B3%29%3D)
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
2x+3x+4x+5x+x+6x+7x=100
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
x+x/3+2x=200
(x^3)^()*x^2=x^14
将式子3x+(2x-x)=3x+2x-x,3x-(2x-x)=3x-2x+x
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
f(x-1)=x^2-2x+3(x
5[x^2-x]=3[x^2+x]