搜搜做题作业网6x^2-13xy 6y^2
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/04 13:37:53
解什么啊,就不是方程
|x-1|+|x-10|表示数轴上x到1的距离+x到10的距离.显然最小值是9,此时x只要在1到10之间就好.类似的,|x-2|+|x-9|的最小值是7,此时x在2到9之间就好.|x-3|+|x-8|
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583
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
依次为：(x-3)(x+1)；(x+9)(x-2)；(x-4)(x+1)；(x+6)(x-1)；(x-4)(x-9)；(2x+1)(x+1)
原式=x²-5x+6+2(x²+x-30)-3(x²-7x+13)=x²-5x+6+2x²+2x-60-3x²+21x-39=18x-93再
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
中间错了原式=(x+2)/(x-3)(x+2)+2x/x(x-3)-(x+1)/(x-3)²=1/(x-3)+2/(x-3)-(x+1)/(x-3)²=3/(x-3)-(x+1)/
原式=x^4-8x^3+13x^2+10+2x(x^2-8x+13)+(x^2-8x+13)=x^2(x^2-8x+13)+10=10分组代入后得10
(x-3)(x+2)+6x=x^2-x-6+6x=x^2+5x-6=(x-1)(x+6)
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)
原式=(x+2)/(x+2)(x-3)-2x/x(x-3)-(x+1)/(x-3)²=1/(x-3)-2/(x-3)-(x+1)/(x-3)²=-1/(x-3)-(x+1)/(x-
主要是考察因式分解这方面的技能啊![(2x²-5x+2)/(6x²+13x+6)]*[(6x²-5x-6)/(6x²-17x+10)]*[(12x²+
设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=
(x+2)/(x^2-x-6)+2x/(x^2-3x)-x/(x^2-6x+9)=(x+2)/[(x-3)(x+2)]+2x/[x(x-3)]-x/[(x-3)^2]=1/(x-3)+2/(x-3)-
原式=[x/(x-3)]-[5x/(x²-x-6)]=[x/(x-3)]-(5x)/[(x-3)(x+2)]=[x(x+2)]/[(x-3)(x+2)]-(5x)/[(x-3)(x+2)]=
不知道你^这个符号什么意思暂且当成平方做吧x^2+4x+3=(x+1)(x+3)(2x-x)^2=x^2x^2+x=x(x+1)x^2+x-6=(x+3)(x-2)约分：得x/(x-2)再问：题目炒错