方程x -5=3x 4 15=
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2x+3x+5x=3210x=32x=3.2
4X+15-3X=17X=2
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
(5-x):3=75-x=3x75-x=21x=-16
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√[
5+3x=17.6-x3x+x=17.6-54x=12.6x=12.6/4x=3.15
x=四分之三3/4
4x-3(20-x)=5x4x-60+3x=5x2x=60x=30
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)
亲爱的楼主:3x+5x=19.2(3+5)x=1902x=19.2÷8x=2.4祝您步步高升
-1
3+2x=5x5x-2x=33x=3x=1
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
(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
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