Question

x ao quadrado -2x =0

Answer 1

x² - 2x = 0

x' = -(-2) + √(-2)²/2.1 = 2 + 2/2 = 4/2 = 2

x" = -(-2) - √(-2)²/2.1 = 2 - 2/2 = 0

Answer 2

x² - 2x = 0
a = 1, b = - 2, c = 0

Δ = b² - 4ac
Δ = (- 2)² - 4 . 1 . 0
Δ  = 4

x = (- b ± √Δ)/2a
x = (- (- 2) ± √4)/(2 . 1)
x= (2 ± 2)/2

x' = (2 + 2)/2 = 4/2 = 2
x'' = (2 - 2)/2 = 0/2 = 0

x = 2, x = 0