Question

x²-8x-144=0
ayuda :(​

Answer 1

x^2 - 8x - 144 = 0
a = 1;. b = - 8; c = - 144

∆ = b^2 - 4ac

∆ = (-8)^2 - 4(1)(- 144)

∆ = 64 +576

∆ = 640 = 64 • 10

Fórmula

x = - b ± √∆ / 2a

x = - (-8)±√64 • 10 / 2(1)

x = 8±√64 • √10 / 2

x = 8±8√10 / 2

x = 8/2±8√10/2

x = 4±4√10

x = 4±4(3,162)

x = 4±12,648

x1 = 4 + 12,648

x1 = 16,648

x2 = 4 - 12,648

x2 = - 8,648

C,S. = {12,648; - 8,648}