The equation is
.
Rewrite the equation in standard form:
\
(Add 16 to each side)
(Apply additive inverse property:
)
Graph the related function:
\Let
.
.
Graph the related function
.

The x-intercepts of the graph appear to be at
,so the solutions are
.
Check:
\To check, substitute
in equation
.
(Substitute
)
(Evaluate powers:
)
(Multiply:
)
(Subtract:
)
The equation is true.
The solutions are
.