解方程9(x²-1)²-4(x²+1)²=0

问题描述:

解方程9(x²-1)²-4(x²+1)²=0

9(x²-1)²-4(x²+1)²=0【3(x²-1)-2(x²+1)】【3(x²-1)+2(x²+1)】=0(x²-5)(5x²-1)=0x²-5=0,5x²-1=0x1=√5,x2=-√5,x3=√5/5,z4=-√5/5...