Question

Como e qui fas esa conta X^4+3x²-4=0

Answer 1

x⁴+3x²-4=0
u²+3u-4=0
a= 1 b=3 c=-4
Δ=b²-4ac
Δ= (3)² -4·1·(-4)
Δ= 9 - (-16)
Δ= 25


u'=- 4
u''= 1

S:[-1,4]

u= x²
x²= 1
x= √1
x= +1,-1


S:[ -1,+1,-4]