Question

Usando a formula de bhaskara resolva a equação x²4x5=0

Answer 1

x²+4x+5
Δ= b²-4ac
Δ=4²-4.1.5
Δ=16*-20
Δ=-4

y1= -b+√ Δ/2a
y2= -b-√Δ/2a

y1 = 4+√-4 /2
y1=  4+1 = 5

y2= 4 - √-4 /2
y2 = 4 -1 = 3
y1 = 3 e y2 = 5