2(x + 3) ^ 2 - 10x - 7 = 21 - 2 (x - 1) (x + 1)?
2(x + 3) ^ 2 - 10x - 7 = 21 - 2 (x - 1) (x + 1).
7Belu23ok
2(x + 3) ^ 2 - 10x - 7 = 21 - 2 (x - 1) (x + 1).
En resumen
Solución : 2(x + 3)² - 10x - 7 = 21 - 2(x - 1)(x + 1) 2(x² + 6x + 9) - 10x - 7 = 21 - 2(x² - 1) 2x² + 12x + 18 - 10x - 7 = 21 - 2x² + 2 4x² + 2x - 12 = 0 2x² + x - 6 = 0 (2x - 3)(x + 2) = 0 x = 3 / 2 ó x = - 2 Saludos!
Wdrealm
Solución :
2(x + 3)² - 10x - 7 = 21 - 2(x - 1)(x + 1)
2(x² + 6x + 9) - 10x - 7 = 21 - 2(x² - 1)
2x² + 12x + 18 - 10x - 7 = 21 - 2x² + 2
4x² + 2x - 12 = 0
2x² + x - 6 = 0
(2x - 3)(x + 2) = 0
x = 3 / 2 ó x = - 2
Saludos!