方程2(5x-10)-3(2x 5)=1的解是
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2x+3x+5x=3210x=32x=3.2
按费拉里公式,原方程可拆分为两个方程2x²+.55405383961193x+9.0521839270015=02x²-4.55405383961193x+2.2094115808
①x+3/4x=0.257/4x=0.25x=1/7再问:第二个?再答:②x-2/5=9/10x=9/10+2/5x=4/5再答:收到了吗再答:这个你不会吗再问:嗯再答:你上几年级再问:5再答:我6再
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
x^5-x^3-2x=0x(x^4-x^2-2)=0x(x²-2)(x²+1)=0x1=0,x2=√2,x3=-√2
是方程叫恒等式方程X的解是所有实数
x1=1/3(10-7(2/(1357-9√[22717]))^(1/3)-(1/2(1357-9√[22717]))^(1/3));x2=10/3+1/6(1+i√[3])(1/2(1357-9√[
3(x-5)²=10-2x展开并化简得:3x²-28x+65=0(3x-13)(x-5)=03x-13=0x-5=0x=13/3或者x=5
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)
5x-4/x-2=4x+10/(3x-6)-1两边同乘(x-2)(3x-6)(5x-4)(3x-6)=(4x+10)(x-2)-(x-2)(3x-6)15x^2-42x+24=4x^2+2x-20-(
3+2x=5x5x-2x=33x=3x=1
将两边同乘X-3得2X-5=10X-30,得2X-10X=-30+5,X=-25分之8
2(x-3)(x+5)=x^2+(x+2)(x-2)+(x+7)2(x^2+2x-15)=x^2+x^2-4+x+72x^2+4x-30=2x^2+x+33x=33x=11
(5x-4)/(x-2)=(4x+10)/3(x-2)-1两边乘3(x-2)3(5x-4)=4x+10-3(x-2)15x-12=4x+10-3x+615x-12=x+1614x=28x=2经检验,x
(x+1)(x-3)=2x+5x²-2x-3=2x+5x²-4x=8x²-4x+4=8+4(x-2)²=12x-2=±2√3x=2-2√3,x=2+2√3
设X为正数则:(X+2)-(3X+5)=1+X解得X=-4/3设X为负数则:(-X+2)-(-3X+5)=1+(-X)解得X=4/3
4x-2(10-x)-10=5(14-x)-3[10-(14-x)]4x-20+2x-10=70-5x-3[10-14+x]6x-30=70-5x+12-3x14x=112x=8
解方程:(x-2)(x^2-6x-9)=x(x-5)(x-3)将方程展开:X^3-6x^2-9x-2x^2+12x+18=x^3-8x^2+15x合并同类项得:12x=18则x=18/12=3/2