13/15减去x等于1/5
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/13 14:33:44
x^2-5x+1=0x=[5±√(25-4)]/2=(5±√21)/2x1=(5+√21)/2,x2=(5-√21)/2补充答案:因为:x1=(5+√21)/2,x2=(5-√21)/2所以:(x1)
[|x|-1]/5-1=[6-|x|]/5|x|-1-5=6-|x|2*|x|=12|x|=6x=±6
6x^2-5x-1=0,所以x^2-4x=x+1,所以x^2-4x-1/x=x+1-1/x,由x^2-5x-1=0得,x-5-1/x=0,即x-1/x=5,所以x^2-4x-1/x=6
2011再问:能不能打下过程再答:x的平方减去5x=2007x-2分之(x-2)的三次方-(x-1)的平方加1=(x-2)^2-x=x^2-5x+4=2007+4=2011
(x+1)/(x^2-x)-1/3x=(x+5)/(3x-3)3(x+1)/(x^2-x)-1/x=(x+5)/(x-1)3(x+1)-(x-1)=x(x+5)3x+3-x+1=x^2+5x2x+4=
再答:再答:上面的那个答案错了再问:哦
2x/5-8/15=4/5×1/22x/5-8/15=2/52x/5=2/5+8/152x/5=14/15x=14/15÷2/5x=7/3
5/(x²+x)-1/(x²-x)=05/x(x+1)-1/x(x-1)=0方程两边同乘以x(x+1)(x-1),得:5(x-1)-(x+1)=04x-6=0x=3/2
解分式方程输入很辛苦.经检验X=7/2是原方程的解.
是(3x²-5x+1)+(3x+1)=3x²-5x+1+3x+1=3x²-2x+2
(x^2-2x)/(x^2-x-6)≥1(x^2-2x)/(x^2-x-6)-1≥0{(x^2-2x)-(x^2-x-6)}/(x^2-x-6)≥0(x^2-2x-x^2+x+6)/(x^2-x-6)
2分之x减去2x分之1等于1(xx-1)/2x=1xx-2x=1再平方得x^4-4x^3+4x^2=13x^4-12x^3+13x^2-2x+5=3(x^4-4x^3+4x^2)+(xx-2x)+5=
(5/12-1/4)*x=1/31/6*x=1/3x=22/3-8x=x/22/3=8.5xx=1/51
(x-1)(x-3)(x-4)(x-5)-(x-1)(x-2)(x-3)(x-5)=(x-1)(x-2)(x-4)(x-5)-(x-1)(x-2)(x-3)(x-4)(x-1)(x-3)(x-5)(x
(2x+1)/3-(5x-1)/6=1两边乘64x+2-5x+1=6-x=3x=-3
4X的平方-5x-1-5x=4x²-10x-1
3x^2-5x-2002=1=>3x^2-5x=20035x-3x^2=-200315x-9x^2+2008=3(5x-3x^2)+2008=3×(-2003)+2008=-4001
4X-5=15X=15+5÷4X=5检验:15+5÷4=5选我吧~我可是很辛苦的哟!
减去-4x等于5x的平方—2x—1的整式是:5x²-6x-1