X3-6X+5=0怎么样化简到(X-1)(X2+X-5)=0 的.
问题描述:
X3-6X+5=0怎么样化简到(X-1)(X2+X-5)=0 的.
答
x³-6x+5=0
x³-x+5-5x=0
x(x²-1)+5(1-x)=0
x(x-1)(x+1)-5(x-1)=0
(x-1)[x(x+1)-5]=0
(x-1)(x²+x-5)=0