Question

H n I g. x V I .. Bi h H- . .

Answer 1

x^2= 169
⇒ x^2 -169= 0
⇒ x^2- 13^2= 0
⇒ (x-13)(x+13)= 0
⇒ x-13= 0 or x+ 13= 0
⇒ x= 13 or x= -13

The correct answer is 13 and -13.

Answer 2

`x^(2) =169\\\\√(x^2) =\pm√(169)\\\\x =\pm √(169)\\\\x =\pm 13\\\\\boxed{\bf{x = 13}}\\\boxed{\bf{x=-13}}`