Question

Find the value of "x" in x² -2 = 47

Thanks :)​

Answer 1

`~~~~~x^2 -2 = 47\\\\\implies x^2 = 47 +2 \\\\\implies x^2 = 49\\\\\implies x = \pm√(49)\\\\\implies x = \pm 7\\\\\text{Hence, }~ x = 7,~~ x = -7`