Question

como resolver: X2 - 4x = 0

Answer 1

x² - 4x = 0

a = 1, b = -4, c = 0

Δ = b² - 4ac

Δ = (-4)² - 4 × 1 × 0

Δ = 16

x = - b ± √Δ / 2a

x = - (-4) ± √16 / 2 × 1

x = 4 ± 4 / 2

x' = 4 + 4 / 2 = 4

x" = 4 - 4 / 2 = 0/2 = 0