Question

Resolva as equações do 2° grau incompletas A)ײ-49=0 B)ײ-20=5 C) 2ײ-32=0 D)ײ-3×=0 E)7ײ+×=0​

Answer 1

Resposta:

$a) \: {x}^{2} = 49 \\ x = 7 \\ b) {x}^{2} = 5 + 20 \\ x = 5 \\ c)2 {x}^{2} = 32 \\ x \\ {x}^{2} = \frac{32}{2} \\ x = 4 \\ d)x(x - 3) = 0 \\ x = 0 \\ x = 3 \\ e)x(7x + 1) = 0 \\ x = 0 \\ x = - \frac{1}{7}$