50X+(50-5)(X+1)=425,x=?

50X+(50-5)(X+1)=425,x=? =(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 =（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 25^x+5^x+1=50 x/50+5-1=x/40 化简求值 x/x-5+50/25-x^-x+1/5+x,其中x=3. 50x(x-1)+60x(x-4)=5100 (x+1)+(x+2)+(X+3).+(x+50)=1325 x+ x+(x*50%)=1.5X? y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|+50n的最小值 2X+(2+X)*1+5*[50-x-(x+2)]=116怎么解 一,当X=50时,2X-16()68 4X-3X()68 二..当X=1时,X平方()7 5X-3()1 初一1道解方程,步骤要详细X/12+X/7+X/8+X/4+X/20+X/5+30+120+300+50=X X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 matlab中函数句柄应用问题?F=@(x)[x(1)+t*x(3)+0.5*t^2*x(5);x(2)+t*x(4)+0.5*t^2*x(6);...x(3)+t*x(5);x(4)+t*x(6);x(5);x(6)];H=@(x)[sqrt(x(1)^2+x(2)^2);atan(x(2)/x(1))];Xk=zeros(6,50);Xk_predict=@(x)F*XO;Pk_predict=@(x)F*PO*F'+Q;%预测误差协 解方程：（1）2x-19=7x+31 (2)20-2x=x-1 (3)19-x=100-10x (4)1/3x+5=2/3x-62x-19=7x+317x-2x=-19-31这里应该是31+19吧？5x=-50x=-50÷5x=-10 10x+2x*[(50-x)/2]+5x[(50-x)/2]=240 x+3x+x-2+x+x+50%x=188 求x