x^3+2x^2-5x-6=?

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/15 18:38:50

x^3+2x^2-5x-6=?
x^3+2x^2-5x-6=?

x^3+2x^2-5x-6=?
x^3+2x^2-5x-6
=(x^3+x^2)+(x^2-5x-6)
=x^2(x+1)+(x-6)(x+1)
=(x^2+x-6)(x+1)
=(x+3)(x-2)(x+1)

x^3+2x^2-5x-6=(x+1)(x+3)(x-2)

x^3+2x^2-5x-6
=(x^3-8)+(2x^2-5x+2)
=(x-2)(x^2+2x+4)+(x-2)(2x-1)
=(x-2)(x^2+2x+4+2x-1)
=(x-2)(x^2+4x+3)
=(x-2)(x+1)(x+3)

x^3+2x^2-5x-6
=x^3+x^2+x^2-5x-6
=x^2(x+1)+(x+1)(x-6)
=(x^2+x-6)(x+1)
=(x+3)(x-2)(x+1)

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 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+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? (x+3x+5x...+2009x)-(2x+4x+6x+...+2010x) 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) x/x-3-5x/x^2-x-6计算 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解? 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X (x+3x+6/x+3x+2)--(x+5x+2/x+5x+6)=? 1/x-2 +3 =1-x/2-x 3/x + 6/x-1=x+5/x²-x 解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7) 解方程：x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6