Question

formula Bhaskara x2+6x-1=0

Answer 1

x² + 6 x - 1 = 0
Δ = b² - 4.a.c
Δ = 6² - 4 . 1 . -1
Δ = 36 + 4
Δ = 40 ⇒ √40 = √2².2.5 = 2√10
x = - b + ou - 2√10 / 2
x´= -6 + 2√10 / 2
x´= -3 + √10
x´´= -6 - 2 √10 / 2
x´´= -3 - √10

S = {-3 - √10 ; -3 + √10 }