Question

help
$\sqrt{2a + 1} = 7$

Answer 1

2 a+1 = 49
2a= 48
a =48/2
a =24

Answer 2

$\: \: \: \: \sqrt{2a + 1} = 7 \\ = > 2a + 1 = {7}^{2} \\ = > 2a + 1 = 49 \\ = > 2a = 49 - 1 \\ = > 2a = 48 \\ = > a = \frac{48}{2} \\ so...a = 24$
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