Question

Qual resultado X(2)-2x-440=0

Answer 1

Resposta:

x² - 2x - 440 = 0

∆ = b² - 4 . a . c

∆ = (-2)² - 4 . 1 . (-440)

∆ = 4 - (-1760)

∆ = 1764

x = -b ± √∆  / 2 . a

x¹ = -(-2) + √1764  / 2 . 1 = 4 + 42 / 2 = 46/2 = 23

x² = -(-2) - √1764  / 2 . 1 = 4 - 42 / 2 = -38/2 = -19

S = {23, -19}