Question 1086718
<pre><font size=4><b>
{{{4m^2n^2-25h^2n^2-4m^2+25h^2}}}

Factor n² out of the first two terms:

{{{n^2(4m^2-25h^2)-4m^2+25h^2}}}

Factor -1 out of the last two terms:

{{{n^2(4m^2-25h^2)-1(4m^2-25h^2)}}}

Factor out the common factor (4m²-25h²)

{{{(4m^2-25h^2)(n^2-1)}}}

Since each of the parentheses contains the difference
of two squares we can factor each as the product of the
difference and sum of the square roots:

{{{(2m-5h^"")(2m+5h^"")(n^""-1)(n^""+1)}}}

Edwin</pre></b></font>