Question

Resolva essa equação
X² + 2x = 3

Answer 1

Resposta:

$x^{2} + 2x-3=0$

Δ= b²-4ac

Δ=2²-4·1·(-3)

Δ=4+12

Δ=16

x= -b±√Δ/2a

x1= 2+√16/2

x1= 2+4/2

x1= 6/2

x1=3

x2=-2-4/2

x2=-2/2

x2= -1