3-1.2x=5 4x-12-搜答案-百度作业网

3x-18=13.23x=13.2+18x=10.41.5x-x=60.5x=6x=6/0.5=124x+1.2x=265.2x=26x=5

是这样的：x^5+x^4=x^3(x^2+x)=(x^2+x)[(x^3-1)+1]=(x^2+x)(x^3-1)+x^2+x=[x(x+1)(x-1)](x^2+x+1)+x^2+x=(x^3-x)

1.x-3=6x5x=-3x=-0.62.x:5=(x-1):45(x-1)=4x5x-5=4xx=51.2x-0.7=0,则12x--------1.2x-0.7=0(乘10得）12x-7=0则:1

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583

54+x=7x*(12+x)54+x=84x+7x^27x^2+83x-54=0方程的△明显是大于0的有2不等的根然后自己算啦!注意x不等于-12

5x+9x=6x*2+12 x+9-x/3=4

x+9x=6x*2+1212x-x-9x=-122x=-12x=-12÷2x=-6x+9-x/3=4两边乘33x+9-x=123x-x=12-92x=3x=3÷2x=3/2

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

(1)4x-4>x+2-3x>或=7/6(2)2x>-65x12x-87/5x6x

3-0.2=1.2X-0.8X2.8=0.4XX=7

每个绝对值里都是正数所以原式=x+1+x+3+x+5+……+x+13-x-2-x-4-x-6-……-x-12=x-1*6+13=x+7=π/2+7

x^3×x^5×x+(x^3)^12+4(x^6)^2=x^(3+5+1)+x^(3×12)+4x^(6×2)=x^8+x^36+4x^12

60-x=34.5+4x4x+x=60-34.55x=25.5x=5.15.6x+4x=17.289.6x=17.28x=1.812(x-2)=3.6x-2=0.3x=2.33x-1.2=3.63x=

设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=

2x(x-3)-(x-3)(x+6)=x²+122x^2-6x-(x^2+3x-18)=x^2+12-9x+6=0x=2/3

x-o.8x=6X=3012x-8x=4.8X=1.23x-8=16X=8x-0.7x=3.6X=127.5x-2x这题没有=

(3x/24+2x/24)*3+(2x/24+x/24)y=x15x/24+3xy/24=x15x+3xy=24x9x-3xy=03x-xy=0x(3-y)=0结果：x=0或y=3

应该是-2x²,不是-3x²3x²-x=1原式=9x^4-3x³+15x³-5x²+3x²-7x+2001=3x²(3x

拆成两个方程解吧

4.316.73.572.5245.2再问：过程、再答：x+5.7=10移项x=10-5.7=4.3x-6.2=10.5移项x=10.5+6.2=16.73x=10.5x=10.5/3=3.5x÷7=

#includesintjiesheng(intn)//用于计算阶乘如：3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x