Question

a) 2x² + 10x + 12 =0​

Answer 1

Explicação passo-a-passo:

$a)2 {x}^{2} + 10x + 12 = 0 \\ < = > \frac{ {2x}^{2} }{2} + \frac{10x}{2} + \frac{12}{2} = \frac{0}{2} \\ {x}^{2} + 5x + 6 = 0 \\ s = 5 \\ p = 6 \\ < = > (x + 2)(x + 3) = 0 \\ < = > x + 2 = 0 \: ou \: (x + 3) = 0 \\ x = - 2 \: ou \: x = - 3$