Question 1138529

Log2(x^2-9)=4
<pre>{{{matrix(1,3, log (2, (x^2 - 9)), "=", 4)}}}
{{{matrix(1,3, x^2 - 9, "=", 2^4)}}} ------ Converting to EXPONENTIAL form
{{{matrix(1,3, x^2 - 9 - 16, "=", 0)}}}
{{{matrix(1,3, x^2 - 25, "=", 0)}}}
(x - 5)(X + 5) = 0
{{{highlight_green(system(matrix(1,3, x, "=", 5), OR, matrix(1,3, x, "=", - 5)))}}}