2X^2+3X=27 X=?

来源：学生作业帮编辑：百度作业网作业帮分类：数学作业时间：2024/07/03 07:34:26

2X^2+3X=27 X=?
5x^3-3x^2-32x-12 因式分解

2X^2+3X=27
2X^2+3X-27=0
(X-3)(2X+9)=0
X=3,X=-9/2
5x^3-3x^2-32x-12
=(5x^3-15x^2)+(12x^2-36x)+(4x-12)
=5x^2(x-3)+12x(x-3)+4(x-3)
=(x-3)(5x^2+12x+4)
=(x-3)(5x+2)(x+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 f(x-1)=x^2-2x+3(x 5[x^2-x]=3[x^2+x] (x+3)×(x+2)×(x+1)×x=3024