X-3 X-1与7-X 3 X 3的值相等-搜答案-智慧作业帮

21x-6x*x+10x*x-5x=4x*x-12x+5628x=56x=2

(x/x-4)(x-3/x-1)=1x(x-3)=(x-4)(x-1)x²-3x=x²-5x+42x=4x=2

x*x+x+1=0(x-1)(x*x+x+1)=0x^3-1=0x^3=1x^7+2x^6+x^5+x^4+x^3+x*x+1=x^6*x+2x^6+x^3*x^2+x^3*x+x^3+x*x+1=x

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

5x+1/2-3x=7x-7/315x+3-18x=14x-14-3x-14x=-14-3-17x=-17∴x=1

解方程（需要过程）15-x=2x15=2x+x15=3xx=53x-7=x+13x-x=1+72x=8x=4X为何值时,代数式4x-5与3x-6的值互为相反数?4x-5+3x-6=04x+3x=5+6

x(x+1)分之(x+4)与x+1的值互为倒数x(x+1)分之(x+4)·x+1=1x分之(x+4)=1x=x+4矛盾

(7-x)/4-(x-1)/3=x+1两边乘1221-3x-4x+4=12x+1212x+3x+4x=21+4-1219x=13x=13/19

1+x+x^2+x^3=0x+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-1)/(x-3)=-(x+3)/55(x-1)=-(x+3)(x-3)x^2+5x-14=0(x+7)(x-2)=0x+7=0x1=-7x-2=0x2=2

main(){intx=1;for(;x

2X²-3X+1+(-3X²+5X-7)=(2-3)x^2+(-3+5)x+(1-7)=-x^2+2x-6-X²+3XY-0.5y²-(-0.25X²

由题意3(x^2-2x+1)-x(3x-4)=5则3x^2-6x+3-3x^2+4x=5-2x+3=5-2x=2x=-1

1/2x³-1/4x+0.2x²+0.25x-0.5x³-1/5x²=(1/2x³-0.5x³)+(0.2x²-1/5x²

x-(2x-3)=6,可得3-x=6,x=-3你先设置我最佳答案后,我百度Hii教你.

x-3/x-1=7-5/x+3（x-3）（x+3）=2（x-1）x²-9=2x-2x²-2x-7=0x²-2x+1-8=0（x-1）²=8x-1=±2√2+1

f(x)=2x^4-3x^3+ax^2+7x+b能被（x-1）（x+2）整除f(1)=2-3+a+7+b=a+b+6=0f(-2)=32+24+4a-14+b=4a+b+42=0解方程组得：a=-12

3x+1-4x=7移项得3x-4x=7-1合并同类项得-x=6系数化为1得x=-6用心点.再问：哦，谢谢。甲种书每本四元，乙种书每本8元，小明用了28元买了两种共六本，问：小明每种书各买了几本？（利用

题目有问题啊是3(x²-2x+1)与x(3x-4)的值分别等于5?两个题目?再问：题目错了是当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5？再答：噢3(x²

x²-3x=2解得,x=(3+√17)/2或x=(3+√17)/22x²-x-1=2解得,x=3/2或x=-1根据,a*x²+b*x+c=0,可得x两解分别为X1=(-b