Question

x²+2 =3
9
Alguém me ajuda ?

Answer 1

Δ=0²-4·1·(-1)
Δ=0+4
Δ=4

x=$\frac{0+/- [tex] \sqrt{4}$}{2.1} [/tex]
x=$\frac{0+/-2}{2}$
x'=$\frac{0+4}{2}$=$\frac{4}{2} = 2$
x'=x''=2

Answer 2

X² = 1². O X equivale a 1