Question

x a quarta+5x ao quadrado+6=0

Answer 1

x^4-5x²+6=0*
x²=y
y²-5y+6=0
delta=25-24
delta=1
y=(5+/-1)/2
y1=3
y2=2
*x²=3
x=+/-
*x²=2
x=+/-
S:{,-,,-}