196*x*x-1(解方程)
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/22 07:38:20
(x+1)(x+3)+4x=-13x方+4x+3+4x+13=0x方+8x+16=0(x+4)方=0x1=x2=-4
(x+1)/x²-3=1/xx+1-3x²=x3x²=1x²=1/3x=±(√3)/3再问:1/x^2-1+2/x+1=3/x-1再答:������������
原分式方程化为:2x+1x(x+1)=56(x+1),方程的两边同乘6x(x+1),得6(2x+1)=5x,解得x=-67.检验:把x=-67代入6x(x+1)≠0,即x=-67是原分式方程的解.则原
x方-2x=2x+1x²-4x=1x²-4x+4=5[x-2]²=5x-2=±√5x=2±√5再问:为啥+4再答:加4后,这个x²-4x+4变为完全平方式。正好
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
(1)去分母得:x2-4x+x2-1=2x(x-1),整理得:2x=-1,解得:x=-12,经检验是分式方程的解;(2)去分母得:5(x-1)-(x+3)=0,解得:x=2,经检验x=2是分式方程的解
2x(x-1)-x(3x+2)=-x(x+2)-122x^2-2x-3x^2-2x=-x^2-2x-122x^2-3x^2+x^2-2x-2x+2x=-12-2x+12=0-2(x-6)=0x-6=0
(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5
(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=(x/2)*(2/x(x+2))+(2/(x+2)(x+4))+.+2/(x+8)(x+10)=(x/2)*[1/x
x-1%x=19.80.99x=19.8x=19.8/0.99x=20x-40%x=150.6x=15x=15/0.6x=25x+25%x=2.51.25x=2.5x=2.5/1.25x=250%x+
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)
(X(13-X)(X+(13-X)))/(X+1)=42得分母是X^2(13-X)+(13-X)X分子是(X+1)再得分母X(13-X)(X+1)分子分母抵消的(X+1)X=42得X=6
1.5X-X=1(1.5-1)X=10.5X=1X=1÷0.5X=2
令x2+2x-8=y,方程化为1y+9x+1y-1y−15x=0,即9x+2yy(y+9x)=1y−15x,解得:y=9x或y=-5x,当y=9x时,x2+2x-8=9x,解得:x1=8,x2=-1;
方程两边同乘x(x+1)(x+2)(x+3)(x+4),得(x+2)(x+3)(x+4)+x(x+3)(x+4)+x(x+1)(x+4)+x(x+1)(x+2)=421x(x+1)(x+2)(x+3)
x(x+1)=42x^2+x-42=0(x-7)(x+6)=0所以x-7=0或x+6=0即x=7,或x=-6
方程变形得:x+2−1x+2-x+3−1x+3=x+6−1x+6-x+7−1x+7,即1-1x+2-1+1x+3=1-1x+6-1+1x+7,整理得:1x+3-1x+2=1x+7-1x+6,即x+2−
x/x-1+1/x=1x²+x-1=x²-22x=1x=1/2
你好,我认真解答了这道题,看最终没有实数解啊.我希望能帮到你