Question

x²-8x+15=0 fórmula general​

Answer 1

Resposta:

general kk

pra resolver com a "formula general"

x²-8x+15=0

Δ = b^2 – 4ac

Δ = (-8)^2 – 4 . 1. 15

Δ = 64 - 60

Δ = 4

x = – b ± √Δ

     2a

x = – (-8) ± √4

     2 . 1

x = 8 ± 2

     2

x' = 8 + 2

     2

x'= 10/2

x'= 5

x''= 8 - 2

     2

x''= 6/2

x''= 3