解方程x-2分x X-7分之X-9=
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X²-3X分之5X-7=X-1分之2+X-2分之3X²-3X分之5X-7=(X-1)(X-2)分之[2(X-2)+3(X-1)]X²-3X分之5X-7=(X²-
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请加括号再问:没有括号再答:是这样吗?x/(x-2)+x/(x-7)-9=x/(x-1)+1+x/(x-6)-8再问:是:x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(
(2x+3)(x-4)-(x+2)(x-3)=x^2+6(2x^2-5x-12)-(x^2-x-6)=x^2+62x^2-5x-12-x^2+x+6=x^2+6-4x-12=04x=-12x=-3
5x/(x²+x-6)+(2x-5)/(x²-x-12)=(7x-10)/(x²-6x+8)5x/(x-2)(x+3)+(2x-5)/(x+3)(x-4)=(7x-10)
(1)方程两边同乘(x-1)(x+1),得:2(x-1)-x=0,整理解得x=2.经检验x=2是原方程的解.(2)方程两边同乘(x-3)(x+3),得:3(x+3)=12,整理解得x=1.经检验x=1
x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8方程两边分别通分,得[(x+2)(x+3)-(x+1)(x+4)]/[(x+1)(x+3)]=[(x+6)(x+7)-(x+8
x+2分之x+1+x+9分之x+8=x+3分之x+2+x+8分之x+7即x+2分之1+x+9分之1=x+3分之1+x+8分之1即x+2分之1-x+3分之1=+x+8分之1-x+9分之1(x+2)(x+
您好:X-4分之3=6分之5x=5/6+3/4x=10/12+9/12x=19/122分之1+X=3分之23/2x=2/3x=2/3÷3/2x=4/9X+4分之3=8分之7x=7/8-3/4x=7/8
(x^2+x)分之7-(x^2-1)分之6=(x-x^2)分之37/(x^2+x)-6/(x^2-1)=3/(x-x^2)7/[x(x+1)]-6/[x(x-1)]=-3/[x(x-1)]分母最小公倍
方程左边1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)对分母因式分解得1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(
再问:再答:?再问:对不起点错了
去分母:(2-x)=x-3+1,化简得:2x=4,∴x=2,经检验,原分式方程的根是:x=2.
这个容易阿,将x=5带入整个方程,得出结果m等于3.满意请采纳
等号前后同时分别计算减法得:(x+1)(x+3)分之2=(x+5)(x+7)分之2所以:(x+1)(x+3)=(x+5)(x+7)x^2+4x+3=x^2+12x+35x=-4
化简3x/5+2x/5-3x/7=4/3x-3x/7=4/34x/7=4/3x=7/3
移项得:xx−2−x+1x−1=x−8x−6−x−9x−7,原方程可变形为:2(x−2)(x−1)=2(x−6)(x−7),解得:x=4,检验:把x=-4代入(x-2)(x-1)(x-6)(x-7)=
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两边乘以(x+2)(x-2)得x(x-2)-(x-2)²=kx²-2x-x²+4x-4=k2x=k+4∵无解∴x=-2或2当x=-2时k=-8当x=2时k=0
x+2分之x+1-x+3分之x+2=x+6分之x+5-x+7分之x+61-(x+2)分之1-[1-(x+3)分之1]=1-(x+6)分之1-【1-(x+7)分之1】从而(x+3)分之1-(x+2)分之