Question 748857
{{{3 + 7n^2 = 52}}}


{{{7n^2 = 52-3}}}


{{{7n^2 = 49}}}

{{{n^2 = 49/7}}}

{{{n^2 = 7}}}

{{{n = sqrt(7)}}}

solutions:

{{{n = sqrt(7)}}}=>{{{n = 2.65}}}
or
{{{n = -sqrt(7)}}}=>{{{n =- 2.65}}}