Question

$\sqrt{1 + 2x \: } = 3 \:$
​

Answer 1

Step-by-step explanation:

$\sqrt{1 + 2x} = \: 3 \\ squaring \: both \: sides \\ 1 + 2x = {3}^{2} = 9 \\ = > 2x = 9 - 1 \\ = > 2x = 8 \\ = > x = \frac{8}{2} = 4 \\ x = 4$

$..$