Question

x² – 5x+ 6 = 0
7x² + 21x – 28 = 0​

Answer 1

Respuesta:

1ra e : x = 2

2da e : x = - 4$f ( x ) x ^2 = 2x - 5x + 6 = 0\\\\- 3x + 6= 0\\-3x = 0 - 6\\x = - 6 / - 3 = 2\\f ( x ) 7x ^2 = 14x - 21x - 28 = 0\\\\- 7x = 0 + 28\\x = 28 / - 7 = - 4$

Explicación paso a paso: