x+x^2=12

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(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2(x+12)(x-2)+(x+7)(x+

x/2+x/8+x/12+x/20=1

x/2+x/8+x/12+x/20=1x/2+x/8+x/12+x/20=1x/2+x/8+x/12+x/20=160X+15X+10X+6X=12091X=120X=120/91x/2+x/8+x/

4x+2x+x-3x=12

4x+2x+x-3x=124x+2x+x-3x=124x+2x+x-3x=124x+2x+x-3x=12(4+2+1-3)x=124x=12x=12/4x=3看明白了的话就采纳吧X=37x-3x=12

(2-x)(6-x)(12-x)(20-x)=

(2-x)(6-x)(12-x)(20-x)=(2-x)(6-x)(12-x)(20-x)=(2-x)(6-x)(12-x)(20-x)==(x²-8x+12)(x²-32x+12

解方程{3X+X+2X=12}3X+X+2X=12

解方程{3X+X+2X=12}3X+X+2X=12解方程{3X+X+2X=12}3X+X+2X=12解方程{3X+X+2X=12}3X+X+2X=126x=12x=2(3+1+2)x=126x=12x

x/2x*2-11x-21=x+7/x*2-12x+35

x/2x*2-11x-21=x+7/x*2-12x+35x/2x*2-11x-21=x+7/x*2-12x+35x/2x*2-11x-21=x+7/x*2-12x+35x/(2x^2-11x-21)=

解放程:x.x-12/(x.x-2x)=2x-1

解放程:x.x-12/(x.x-2x)=2x-1解放程:x.x-12/(x.x-2x)=2x-1解放程:x.x-12/(x.x-2x)=2x-1x=3[综合除法]x=3[综合除法]

(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)

(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)(4/x-5)+(x-3)/(12-x)

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+1

|x|-2/x*x-x-12

|x|-2/x*x-x-12|x|-2/x*x-x-12|x|-2/x*x-x-12分两种情况一种X大于0,全成立:一种X小于0,具体分析把,应该不难,你试下因为X在分母,X平方肯定大于0,两边同乘X

f(x)=x^2+x (x

f(x)=x^2+x(xf(x)=x^2+x(xf(x)=x^2+x(x你的条件好像不全吧,请你把题完整的给出来.后面的f(-x)有没有另加条件,比如x>0这个条件?

数学题化简2(x-3)(x+3)-(x+3)(3-x)其中x=12(x-3)(x+3)-(x+3)(3-x) 其中x=1

数学题化简2(x-3)(x+3)-(x+3)(3-x)其中x=12(x-3)(x+3)-(x+3)(3-x)其中x=1数学题化简2(x-3)(x+3)-(x+3)(3-x)其中x=12(x-3)(x+

解方程 式子 6-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+1 2x-1=5x-36-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+12x-1=5x-3

解方程式子6-2x+3x=3x-4x+3x+186-x+3x=2x-5x+12x-1=5x-36-2x+3x=3x-4x+3x+186-x+3x=2x-5x+12x-1=5x-3解方程式子6-2x+3

3道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6)

3道简单的分式方程,1.3/(1-x^)=2/(1+2x+x)-5/1-2x+x^2.5x/(x^+x-6)+(2x-5)/(x^-x-12)=(7x-10)/(x^-6x+8)3.(x+1)/(x+

(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)其中x=-5/2

(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)其中x=-5/2(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)其中x=-5/2(x-2)(x-3)+2(x

1/x(x+2)+1/(x+2)(x+4)+1/(x+4)(x+6)=3/2x+12

1/x(x+2)+1/(x+2)(x+4)+1/(x+4)(x+6)=3/2x+121/x(x+2)+1/(x+2)(x+4)+1/(x+4)(x+6)=3/2x+121/x(x+2)+1/(x+2)

若x=π/3,|x+1|+|x+3|+...+|x+13|-|x+2|-|x+4|-...-|x+12|55555555.

若x=π/3,|x+1|+|x+3|+...+|x+13|-|x+2|-|x+4|-...-|x+12|55555555.若x=π/3,|x+1|+|x+3|+...+|x+13|-|x+2|-|x+

(x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),其中x=三分之一,求值

(x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),其中x=三分之一,求值(x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),其中x=三分之一,求值(x+2)(x-