[()x+52.8)×5-3.9343]÷0.5-10x-搜答案-搜狗做题网

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/x-5)=(x-2)/(x-3)x(x-3)=(x-2)(x-5)x^2-3x=x^2-7x+104x=10x=5/22.(6x-1)/(3x+2)=(4x-7)/(2x-5)(6x-1)(

[表示≥]表示≤(表示>)表示

(1)x+2=±5x=-2±5(2)(x+1)(2x-3)=0x=-1或3/2(3)x={6±√[6^2-4x(-5)]}/2=(6±√56)/2=3±√14(4)(x+3)²=2(x+3)

5x+6.3x=3.

5x+6.3x=3.39(5+6.3)x=3.3911.3x=3.39x=0.3

x=-3x·(x-4)·(x+4)-(x+3)·(x^2-6x+9)+5x^3y^2÷x^2y^2=x(x^2-16)-(x+3)(x-3)^2+5x=x^3-16x-(x^2-9)(x+3)+5x=

1.5/8x-22=3/7x乘以56得35x-1232=24x35x-24x=123211x=1232x=1122.x/5-6=x/6-2乘以30得6x-180=5x-606x-5x=-80-60x=

迭代计算出来就可以就是难算,详细步骤,自己做

1.（x+1)(X+3)(x+5）（X+7）+15={(x^2+8x)+7)}{x^2+8x)+15}+15,设x^2+8x=t(t+7)(t+15)+15=t2+22t+120=(t+10)(t+1

第二问简单,y=(x-1)(x-4)/(x+2)(x-4)由于是求2

一、2x的平方-5x+x的平方+4x=2x平方+x平方-5x+4x=3x平方-x=x*（3x-1)=-3*(-9-1)=-3*(-10)=30二、4分之一a的平方b减2分之一a的平方b+5分之二ab的

1.2x²-4x-1=0x²-2x-1/2=0x²-2x+1-1-1/2=0（x-1）²-3/2=0x-1=±√（3/2）x1=1+√6/2x2=1-√6/22

1.x>12.x

证明：x+1=（x+1)(x^2-x+1)=(x+1)（1+1）=2x+2所以x=2x+1x^5+x^2=x^2(x+1）=x^2（2x+2）=2x^3+2x^2=2(2x+1)+2x^2x^5=4x

(3x+2)(4x-7)=(6x-1)(2x-5)12x²-13x-14=12x²-32x+519x=19∴x=1检验：x=1是方程的根两边乘以(x-1)(x+2)得2x(x+2)

#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

/>(x+2)/(x+1)-(x+3)/(x+2)-(x+4)/(x+3)+(x+5)/(x+4)=1+1/(x+1)-1-1/(x+2)-1-1/(x+3)+1+1/(x+4)=1/(x+1)-1/

(x²+5x+2)(x²+5x+3)-12=(x²+5x)²+5(x²+5x)+6-12=(x²+5x)²+5(x²+5

（x-2-x+2分之5）÷2x+4分之x-3=（x-2-x+5/2）÷2x＋x/4-3=1/2÷2x＋x/4-3=1/4x＋x/4-3

不太明白你的意思,是二个多项式通分同分母吗?(x+4)/(x^2+4x)=(x+4)/[x(x+4)]=1/x=(x-2)/[x(x-2)(x-5)/[x(x-5)-2(x-5)]=(x-5)/[(x