12.56x除以的平方等于
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x²+(16-x)²=160x²+256-32x+x²=160x²-16x+48=0(x-12)(x-4)=0x=12,x=4
5/(x²+x)-1/(x²-x)=05/x(x+1)-1/x(x-1)=05x-5-x-1=04x=6x=3/2x=2分之3再问:5x-5-x-1=0这个是怎么算的?再答:方程两
因为x^2-x^2/2=3==>x^2=6==>x=根号61/(1-x)-(1/(1x))/(x/(x^2-1)x)=1/(1-x)-(1/(1x))/((xx^3-x)/(x^2-1))=1/(1-
再问:我去再问:再问:是这个再问:是x分之2么再答:是的
用到求根公式再问:怎么解用一元二次方程公式法再答:再问:太给力了,你的回答完美解决了我的问题!
[x-1]/(x-3)=m^2/(2x-6)2(x-1)=m^2当X-3=0,即X=3时方程有增根,代入得:m^2=2(3-1)=4m=+2或-2
已知:(x^2-x+1)/x=5, 即x-1+1/x=5 x+1/x=6; 两侧平方:x^2+2+1/x^2=36 即x^2+1/x^2=34 求:x^2/(x^4+x^2+1)=?x^2/(
[(56-x)/4]^2-[(x/4)^2]=100方程同时*4^2得(56-x)^2-x^2=1600打开平方项x=1536/112=96/7=13.7
c=√(a²+b²)e1=c/a,e2=c/be1+e2=c*(1/a+1/b)=c(a+b)/(ab)(e1+e2)²=c²*(a+b)²/(a
dy/dx=-x^2/yydy=-x^2dx∫ydy=-∫x^2dx1/2y^2=-1/3x^3+c即:3y^2=-2x^3+C.
x再答:第二个你错了再答:7x²再问:那x的3次方除以x的3次方等于多少呢?再答:1
x^2/(5-x)=0.04xx^2-0.04x(5-x)=0x^2+0.04x^2-0.2x=0x=0等式成立x≠01.04x=0.2x=0.2/1.04=5/26综上所述:x=0或x=5/26再问
x=(√20-4)/2=(2√5-4)/2=√5-2所以x²=(√5)²-4*√5+4=9-4√51/x=1/(√5-2)=(√5+2)/[(√5)²-2²]=
将3x/(x-1)-x/(x+1)通分得
1/x+x=5,求x^2/(x^4+x^2+1)=?由1/x+x=5得1+x^2=5x,===》x^2=5x-1,代人x^2/(x^4+x^2+1)=(5x-1)/【(5x-1)/(5x-1)^2+(
x²/(x-1)-x=(x²-x²+x)/(x-1)=x/(x-1)
y=(3x²+2x+2)/(x²+x+1)yx²+yx+y=3x²+2x+2(y-3)x²+(y-2)x+(y-2)=0x是实数,所以判别式大于等于0
【分析】(x-3)^2=(3-x)^2只需要提取公因式x/(3-x)3x/(x-3)^2-x/(3-x)=3x/(3-x)^2-x/(3-x)=x/(3-x)[3/(3-x)-1]=x/(3-x)*x
2Y分之X平方