Question

quanto é: k2 (k elevado a 2) + 15k + 56 ?

Answer 1

k² + 15k + 56

Δ= 15² - 4 . 1 . 56
Δ= 225 - 224
Δ= 1

k = -15 ± 1 / 2
k' = -15 + 1 / 2 = -14 / 2 = -7
k" = -15 - 1 / 2 = -16 / 2 = -8