4/5x等于4/3求解解方程
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3x²+5x=0x(3x+5)=0∴x=0x=-5/3(2a-1)²=02a-1=0a=1/2(2x-5)²=92x-5=32x-5=-3x=4x=1(2x+x-1)(2
移项再化一下得(2x)²-(3x-2)²-0用平方差公式得(2x+3x-2)(2x-3x+2)=0x1=0.4,x2=2
1、0.4:x=(1+1/7):5外项的积等于内项的积,∴(8/7)x=2,∴x=7/4.2、0.8:3又3/4=(5-x):0.75仿上,(15/4)(5-x)=0.6,75-15x=2.4,72.
(4-x)(3x+6)=0-3(x-4)(x+2)=0x1=4,x2=-24y(y-1)=2y(y-1)4y(y-1)-2y(y-1)=02y(y-1)=0y1=0,y2=1
[(a+1)(a+2)/(a^2-4a+4)-a/(a^2-2a)]/[a/(a-2)]=[(a+1)(a+2)/(a-2)^2-a/a(a-2)]/[a/(a-2)]=[(a+1)(a+2)/(a-
把(x-3)作为公因数提出来(x-3)*(x-3+4x)=0(x-3)*(5x-3)=0所以x1=3,x2=3/5=0.6
4x^2-25x+6=0(4x-1)(x-6)=0x1=1/4,x2=6
x^2+2x-4=0(x^2+2x+1)-5=0(x+1)^2-5=0(x+1+√5)(x+1-√5)=0x1=-1-√5x2=-1+√5
x=0或1令3^x=t,则原方程化为t+3/t=4,两边同时乘以t移项整理可得:t^2-4t+3=0则t=1或t=3再把t=3^x带入可解得:x=0或x=1
3(x-5)^2=2(5-x)3(5-x)^2=2(5-x)3(5-x)^2-2(5-x)=0(5-x)[3(5-x)-2]=0(5-x)(15-3x-2)=0(5-x)(13-3x)=0x=5或x=
(4x-3)(3x-1)=212x^2-4x-9x+3-2=012x^2-13x+1=0(12x-1)(x-1)=0x1=1/12x2=1(3x-2)=(2-3x)(x+1)(3x-2)+(3x-2)
5x²-4x=0x﹙5x-4﹚=0x1=0x2=4/5.
移项4x²-1=0(2x+1)(2x-1)=0x=-1/2,x=1/2
(3x+2)平方=4(x一3)平方(3x+2)²-4(x一3)²=0[(3x-2)+2(x-3)][(3x-2)-2(x-3)]=0(3x-2+2x-6)(3x-2-2x+6)=0
(5x-3)^2=(2x+1)^25x-3=2x+1或5x-3=-2x-13x=4或7x=2x=4/3或x=2/73(x+3)^2=x^2+x3x²+18x+27=x²+x2x
x(x²+4)=0x²+4>0,即不会等于0所以x=0
1.x-2=x(x-2)(x-2)(x-1)=0x=2或x=12.4x^2-169=0(2x+13)(2x-13)=0x=-13/2或x=13/23.(x-5)^2=2(5-x)(x-5)^2-2(5
3x²-6x=-4x+83x²-2x-8=0(3x+4)(x-2)=0x=-4/3,2再问:第三步能详细点吗谢谢--再答:十字相乘法:3x41x-2————-6x+4x=-2x
1/2x^2+5x-3=0x^2+10x-6=0x^2+10x+25=31(x+5)^2=31(x+5+根31)(x+5-根31)=0x=-5-根31或=-5+根31