Question

Resuelve;
a) –x2 = –4
b) x2 – 2x = 0
c) x2 – 0.5x – 3 = 0​

Answer 1

Respuesta:

a) -x² = -4

x² = 4

x = ±2

b) x² - 2x = 0

x · (x - 2) = 0

1) x = 0

2) x = 2

c) x² - 0,5x - 3 = 0

Usar la fórmula:

x = (-b ± √(b² - 4ac))/(2a)

x = (0,5 ± √(0,5² - (4 · 1 · (-3)))/(2 · 1)

x = (0,5 ± √(0,25 - (-12))/(2)

x = (0,5 ± √(0,25 + 12))/(2)

x = (0,5 ± √(12,25))/(2)

x = (0,5 ± 3,5)/(2)

1) x = 2

2) x = -3/2