3*x-12*6

=[x^3(x+2)(x-2)+x+2]/[(x+2)^3]=[x^3(x-2)+1]/[(x+2)^2]没有什么明显的化简,检查一下题目是否正确

=x^18+x^15+x^12+x^9+x^6+x^3+1+x^3-1+5-4分解因式把下面的18换成21就是了=(x^18+1)+(x^15+1)+(x^12+1)+(x^9+1)+(x^6+1)+

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

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

15x=23x-248x=24x=312+5x=3x-82x=-20x=-103(x-3)=9-(x+6)4x=9+9-6=12x=34+x=4x-173x=21x=7

原式为:[(4x²＋12x)／(x²＋x－6)]／[(x－2)／(x＋2)－(x＋2)／(x－2)]=4x(x＋3)／(x＋3)(x－2)÷[(x－2)²－(x＋2)&#

1.4(x+5)(x+6)(x+10)(x+12)－3x^2=4*[(x+5)(x+12)][(x+6)(x+10)]-3x^2=4*(x^2+60+17x)(x^2+60+16x)-3x^2=4*[

原式=3(X-3)/[2(X-3)(X+2)]-(X-3)/[(X-2)(X-3)]+2X/[(X+3)(X-3)]=3/[2(X+2)]-1/(X-2)+2x/[(X+3)(X-3)]=(X-10)

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

x平方-6x+8=x²-2×3x+9-9+8=（x-3）²-1=（x-3-1）（x-3+1）=（x-4）（x-2）x平方+x-6=（x-2）（x+3）12+x-x平方=（4-x）（

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

(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)=x^2-5x+6+2x^2+2x-60-3x^2+21x-36=18x-90=18*(-5/2)-90=-45-90=-135

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

【不好意思,题目太难让我想了很久】储备知识：x^n-y^n=(x-y)【x^(n-1)+x^(n-2)y+x^(n-3)y²+……+x²y^(n-3)+xy^(n-2)+y^(n-

原式化简：{（x-3)(x-2)/(x-3)(x-4)}²÷{(x+1)(x+2)/(x-4)(x+2)}²{(x-2)/(x-4)}²÷{(x+1)/(x-4)}

原式=1/（x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)=1/(x+1)-1/(x+2)+1/(x+2)-1/（x+3)+1/(x+3)-1/(x+4)=1/(x+1)-1/

①x8x1(x+8)(x+1)②x-3x-3(x-3)^2③x3x-4(x+3)(x-4)④x3x7(x+3)(x+7)⑤x5x-25(x+5)(x-25)⑥x12x3(x+1)(2x+3)

分步写,好让看的清楚符号[√(x^2-6x+9)/x^2-x-12]=√(x-3)^2/(x-4)(x+3）=（x-3)/(x-4)(x+3）；(x^3-16x)/(x^2-3x)=x(x^2-16)

x^9+x^36+4x^12

括号里的二次多项式分别化成（x+a)(x+b)形式再约分.分数线上方是[(x+4)(x-3)]^2*(x-1)(x-2)*[(x+1)(x+2)]^2下方是[(x-1)(x+2)]^2*(x+1)(x