Question

em R, Resolva 2x⁴-6x²-8=0​

Answer 1

2x⁴-6x²-8=0. ===> :(2)

x⁴ -3x²-4 =0 => b/c = -3/-4 = 1-4/1×-4

(x²+1) .(x²-4)=0

(x²=-1) (x²=4)

x=√-1. x=√4

x={ }. x= ±2 ✓