Question

EXEMPLE DE ECUATI DE GRADUL
2

Answer 1

x² + 4x - 2= 0 ⇒ a = 1, b = 4, c = -2

Δ = b² - 4ac
Δ = 16 + 8
Δ = 24 ⇒ √Δ = √24 = 2√6

x1 = ( - b + √Δ ) / 2a ⇒ x1 = ( - 4 + 2√6 ) /2
Dam factor comun pe 2 ⇒ 2 ( -2 + √6 ) /2a ⇒ -2 + √6

x2 = ( - b - √Δ ) / 2a ⇒ x2 = ( - 4 - 2√6 ) /2
Dam factor comun pe 2 ⇒ 2 ( -2 - √6 ) /2a ⇒ -2 - √6