ayuda, porfavor necesito que me ayuden a resolver unas ecuaciones, no entendi, porfis Resolver las siguientes ecuaciones cuadráticas. a) x2 – 8x + 12 = 0 b) x2 = 5x 4 c) – x2 – 2x + 3 = 0 d) x2 – 4 = 0 e) x2 – 2x = 3 f) 2x2 – 4x = 0 g) x2 = 0 h) 3x2 = 0
Respuestas a la pregunta
Contestado por
1
Respuesta:
a) x² – 8x + 12 = 0
x² - 2x - 6x + 12 = 0
x (x - 2) - 6 (x - 2) = 0
(x - 2) (x - 6) = 0
x - 2 = 0
x - 6 = 0
x = 2
x = 6
b) x² = 5x × 4
x² = 20x
x² - 20x = 0
x (x - 20) = 0
x = 0
x - 20 = 0
x = 0
x = 20
c) – x² – 2x + 3 = 0
x² + 2x - 3 = 0
x² + 3x - x - 3 = 0
x (x + 3) - (x + 3) = 0
(x + 3) × (x - 1) = 0
x + 3 = 0
x - 1 = 0
x = -3
x = 1
d) x² – 4 = 0
x² = 4
x = ±2
x = -2
x = 2
e) x² – 2x = 3
x² - 2x - 3 = 0
x² + x - 3x - 3 = 0
x² (x + 1) - 3 (x + 1) = 0
(x + 1) × (x - 3) = 0
x + 1 = 0
x - 3 = 0
x = -1
x = 3
f) 2x² – 4x = 0
2x × (x - 2) = 0
x (x - 2) = 0
x = 0
x - 2 = 0
x = 0
x = 2
g) x² = 0
x = 0
h) 3x² = 0
x² = 0
x = 0
Otras preguntas