Question

(5× ²+1) ²me ajudem por favor

Answer 1

(x - 5)² = 1 (x - 5) . (x - 5) = 1 x² -5x -5x + 25 = 1 x² -10x + 25 = 1 x² - 10x + 25 - 1 = 0 x² - 10x + 24 = 0 ~> a = 1 , b = -10 , c = 24 Δ = b² - 4ac Δ = (-10)² - 4.1.24 Δ = 100 - 96 Δ = 4 x = -b ± √Δ 2a x = -(-10) ± √4 2.1 x = 10 ± 2 2 x' = 10 + 2 = 12 = 6 x" = 10 - 2 = 8 = 4 2 2 2 2 S = {4,6}