(x-5)(-50x+850)-250=1350

(x-5)(-50x+850)-250=1350 x+3x+5x+7x+9x...+99x=250 x+ x+(x*50%)=1.5X? 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!)+. X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 10x+2x*[(50-x)/2]+5x[(50-x)/2]=240 x-三分之一x-四分之一x(x-三分之一x)=5 解方程x+(x+250)=850 600*X=850+(X-1)*250 =（x^2-5x+4)(x^2-5x+6) =(x^2-5x)^2+10(x^2-5x)+24 是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24不好意思我弄错了，是=（x^2-5 =(x^2-5x)^2+10(x^2-5x)+24 =x^4-10x^3+25x^2+10x^2-50x+24 这是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24 50X+(50-5)(X+1)=425,x=? 5x^-15x=50除以5x 解方程：60%x+5+50%x-25=x x-5%x-50%x×60%=36解方程 5(x/10+x/12)=x-50怎么解 2x+8-10x+50=5x-10 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?