(x²-5x²）²-2（x²-5x）-24=0

(x²-5x²）²-2（x²-5x）-24=0
(x²-5x²）²-2（x²-5x）-24=0

(x²-5x²）²-2（x²-5x）-24=0
设y=x^2-5x

y^2-2y-24=0

(y+4)(y-6)=0

y1=-4、y2=6

x^2-5x=-4,(x-1)(x-4)=0,则x1=1、x2=4

x^2-5x=6,(x+1)(x-6)=0,则x3=-1、x4=6







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