①a-1分之a² -a-1(写过程)② x-3分之1-x²-9分之6-6-2x分之x-1(写过程)
来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/04/29 04:14:43
①a-1分之a² -a-1(写过程)② x-3分之1-x²-9分之6-6-2x分之x-1(写过程)
a²/(a-1) - a - 1
= a²/(a-1) - (a+1)
= a²/(a-1) - (a+1)(a-1)/(a-1)
= a²/(a-1) - (a²-1)/(a-1)
= [ a² - (a²-1)]/(a-1)
= 1/(a-1)
1/(x-3) - 6/(x²-9) - (x-1)/(6-2x)
= (x+3)/[(x+3)(x-3)] - 6/[(x+3)(x-3)] + (x-1)(x+3)/[2(x+3)(x-3)]
= [ x+3 - 6 + (x-1)(x+3) ] / [(x+3)(x-3)]
= (x-3+x²+2x-3) / [(x+3)(x-3)]
= (x²+3x-6)/[(x+3)(x-3)]
= a²/(a-1) - (a+1)
= a²/(a-1) - (a+1)(a-1)/(a-1)
= a²/(a-1) - (a²-1)/(a-1)
= [ a² - (a²-1)]/(a-1)
= 1/(a-1)
1/(x-3) - 6/(x²-9) - (x-1)/(6-2x)
= (x+3)/[(x+3)(x-3)] - 6/[(x+3)(x-3)] + (x-1)(x+3)/[2(x+3)(x-3)]
= [ x+3 - 6 + (x-1)(x+3) ] / [(x+3)(x-3)]
= (x-3+x²+2x-3) / [(x+3)(x-3)]
= (x²+3x-6)/[(x+3)(x-3)]
①a-1分之a² -a-1(写过程)② x-3分之1-x²-9分之6-6-2x分之x-1(写过程)
①x²-2x分之x+2-x²-4x+4分之x-1(写过程)②a²+2a分之a-2+a平方+
已知A={X|3X-1小于2X+2},B={X|3分之2 X+1大于等于6减3分之1x过程
x-3分之1-x的平方-9分之6-6-2x分之x-1的过程
x-4分之1乘3分之2=5分之1写过程怎么算
x-4分之1乘3分之2=5分之写过程1怎么算
简单解方程要过程(1)X-7分之1X=21分之20(2)8分之7+X=4分之25(3)X-3分之1X=6分之5 要过程!
已知方程6x-2分之3-x=5与方程2分之x-3-3分之x-a=1同解,求a的值(要过程!)
已知(x+6)(x-3)分之2x+1=x+6分之A+x-3分之B
4分之3x²-2分之1x-8分之1=0求过程
x分之2=3x-1分之3 过程
解方程(要写过程)二分之X+1=6 四分之三X-2=八分之五 十五分之二X+六分之五X=四十分之二十九