(-0.25)x(-2)x(-5/12)x(+0.8)

(-0.25)x(-2)x(-5/12)x(+0.8) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20 求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13 求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || x^2-6x+5/-x^2+4x+12 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^5-12x^3+36x)/(x^2-6) 3x-{-4x+{5x-(12x-10]+2} 计算：x^2-5x+6/x^2-x-2x^2-7x+12/x^2-2x-8 计算：x^2-5x+6/x^2-x-2x^2-7x+12/x^2-2x-8 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 (x*x+5x+2)(x*x+5x+3)-12 (4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60) 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 |x|-2/x*x-x-12 2x-6/x^2-4x+4除以12-4x/x^2+5X-6除以x^2+5x+6/x^2-5x-6 数学化简3x-x^2/5x+4 x 18/4x-12(3x-x^2)/(5x+4) x 18/(4x-12)