(5x-90)*3=(3x 90)*2怎么解
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解方程:x(3x-4)+2x(x+7)=5x(x-7)+90
若x(3x-4)+2x(x+7)=5x(x-7)+90,则x=
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x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x(x-2)-2x(x+1)-3x(x-5) 其中x=负½
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x
3X/2 * 5X/2 - X * 3X/2=90,
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x^5-2x^3+x=?
写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4
因式分解(x2+3x+2)(4x2+8x+3)-90(x2+3x+2)(4x2+8x+3)-90=(x+1)(x+2)(2x+1)(2x+3)-90=(x+1)(2x+3)(x+2)(2x+1)-90=(2x²+5x+3)(2x²+5x+2)-90=(2x²+5x)²+5(2x²+5x)-84=(2x²+5x+12)(2x²+5x-7)=(2x²+5x+12)(2x+7)(x-1)从第四
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
不等式5x^3+10x^2-45x-90