解方程2x^4-13x^2+15=0

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 解方程：x(x+2)-4x=0 解方程(x^2+4x)^2-2(x^2+4x)-15=0 解方程2x^4-x^2-15=0 解方程4x^4+12x^3-x^2-15x-6=0 解方程；x/x-4=5x/x-2 解方程：x(x-4)=(x-2)(x-6) 解方程：2/x^2+x+3/x^2-x-4/x^2-1=0 解方程4x^2+2x√(3x^+x)+x-9=0 解方程：(4/x-2)+(x-1/x-5x+6)+(2/3-x)=0 (x-1)(x-3)(x-4)(x-12)+5x^2=0解方程 x^2=-4x 解方程 解方程2x^5+5x^4-13x^3-13x^2+5x+2=0 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 解方程,一元三次方程...4x^3-6x^2+5x-1=0 MATLAb编程解方程clear;clcsyms xfor n=1:6X2=solve('(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)+1e-n*x^19=0',x);double(X2)end与直接代入n=1,2,...6算出来 matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p（x）+n*x^19=0,并 解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42