作业帮x*x-5x-6=0
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/18 00:50:42
4/(x-2)+(x-1)/[(x-2)(x-3)]-2/(x-3)=0[4(x-3)+(x-1)-2(x-2)]/[(x-2)(x-3)]=03(x-3)/[(x-2)(x-3)]=0不知道解了~~
x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊
2x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/7
x+x^2+x^3+x^4+x^5+x^6+x^7+x^8=（x+x^2+x^3+x^4）+（x^5+x^6+x^7+x^8）=x（1+x+x^2+x^3）+x^5（1+x+x^2+x^3）=（x+x
6x^3+7x^2-13x+11＝6x^3+3x^2-15x+4x^2+2x-10+21＝3x（2x*x+x-5）+2（2x*x+x-5）+21＝3x*0+2*0+21＝21
3x*x=1+x得6x*x*x+7x*x-5x+2000=3x^2*2x+7x^2-5x+2000=(1+x)2x+7x^2-5x+2000=9x^2-3x+2000=3(3x^2-x)+2000=3
即x²-5x=-1所以原式=x³-5x²+x²-5x+x-1=x(x²-5x)+(x²-5x)+x-1=-x-1+x-1=-2
x^2+x+1=0x^4+x³+6x²+5x+5=x^4+x^3+x^2+5x^2+5x+5=x^2(x^2+x+1)+5(x^2+x+1)=0+0=0
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
有种方法叫做穿针引线法,需要在纸上画出函数的简图,这个题的答案应该是-2,3,6,1
(x^3+x^2)+(x^2-5x-6)=x^2*(x+1)+(x+1)(x-6)=(x+1)(x^2+x-6)(x+1)(x+3)(x-2)=0所以,它的解有：x=-1,x=-3,x=2
（1）2x^3-6x^2-3x+9=02x^2(x-3)-3(x-3)=0(2x^2-3)(x-3)解得：x1=3/2,x2=根号6/2,x3=-根号6/2（2）X^3-3x-2=0x^3-2x^2+
(X-5)(X-6)=X-5则(x-5)(x-6)-(x-5)=0则(x-5)(x-6-1)=0则(x-5)(x-7)=0所以x=5或x=7
(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)[(x-4)(x-6)-(x-5)2]/(x-5)(x-6)=[(x-7)(x-9)-(x-8)2]/(x
x（x*x-1)+x(5-x*x)-6y+7=-x+5x-6y+7=2(2x-3y)+7=2*(-4)+7=-8+7=-1再问：能在写详一点吗-x+5x-6y+7再答：x（x*x-1)+x(5-x*x
要过程还是答案
1,应该是x是几次幂就有几个根吧,所以应该是7+2=9个2.-7.036622145,-6.489288572,-6.200988153,-4.734373320,-4.289168546,-2.77
x^2+5x-990=0,两边同乘x,得x^3+5x^2-990x=0,加上原式,得x^3+6x^2-985x-990=0,则x^3+6x^2-985x+2010=0+990+2010=3000希望采
把3x²-x=0提取公因数后得X（3x-1)=0那么得x=0或x=两种答案把x=0代入原式=6x0³+7x0²-5x0+2006=0+0+0+2006=2006;把x=1