解下列方程(1)(x²-x)²-36=0 (2) x²-|x|-2
问题描述:
解下列方程(1)(x²-x)²-36=0 (2) x²-|x|-2
(1)(x²-x)²-36=0 (2) x²-|x|-2=0
答
(1)(x²-x)²-36=0x²-x=±6 对于x²-x=6 ,即x²-x-6=0,即(x+2)(x-3)=0,解得x=-2或x=3对于x²-x=-6 ,即x²-x+6=0,因⊿=(1)^2-4*1*60时,方程为x²-x-2=0,即(x+1)(x-2)=0,解得x=-1...