9减x等于4.5的解方程-搜答案-智慧作业帮

因式分解为（3x+2）(x-4)=0故x=-2/3x=4

12-2✘=7.612-7.6=2✘2✘=4.4✘=2.2

x小于等于4或者x大于等于8

(x-5)²=169x-5=13或x-5=-13x=18或x=-8

9.5X-5X=0.94.5X=0.9X=0.9÷4.5X=0.2

再答：求采纳

2x/(x-2)=12x/(x-2)-1=0[2x-(x-2)]/(x-2)=0(2x-x+2)/(x-2)=0(x+2)(x-2)=0x=-2

12x-9x=8.7原方程可化为(12-9)x=8.7即3x=8.7所以x=2.9检验：将x=2.9代入原方程得(12-9)*2.9=3*2.9=8.7所以x=2.9是原方程的解

10x=x-4.510x-x=4.59x=4.5x=0.5

将5移到左边x²-4x-5=0(x+1)(x-5)=0得两解x1=-1x2=5

18x-39＝5618x＝39＋5618x＝95x＝95/18

:x²-4x-4=9:x²-4x=13（x-2）²=17x-2=±√17∴x1=√17+2x2=-√17+2

x^2-10x+9=0(x-1)(x-9)=0x=1或x=9

12-4x=3.64x=12-3.64x=8.4x=2.18：x=4.5:1.54.5x=12x=8/3x+3x=4.084x=4.08x=1.02102乘22减1428除14=2244-102=21

9x²=(x-2)²3x=x-2,或者3x=2-x解得：x1=-1x2=1/2

6x-x=415x=41x=41/5x=8.2

x-0.85x=4.50.15x=4.5x=30

X=1啊

x(x^2-1)=0解出x=-1、0、1