Question

nove x ao quadrado menos dezeseis igual a zero​

Answer 1

Resposta:

a) 2ײ- 50= 20 --> 2ײ= 50 -->ײ =50/2 --> ײ =25 --> × = +/-\/25 --> × = +/-5

b) ײ -9 = 0 --> ײ = 9 --> × = +/-\/9 --> = +/-3