Question 285442
{{{16x^2 - 25}}}
I'm not sure what the question is, but
if it's "find the roots", then
{{{16x^2 - 25 = 0}}}
{{{16x^2 = 25}}}
{{{x^2 = 25/16}}}
{{{x^2 = 5^2/4^2}}}
{{{x^2 = (5/4)^2}}}
Take the square root of both sides
{{{x = 5/4}}}
and also
{{{x = -(5/4)}}}