$$\frac{4a^{2}+12ab+ab^{2}}{al^{2}-c^{2}}=\frac{(2a+5b)^{2}}{(d-c)(d+c)}; a=5:6=4;c=6;9=16$$
$\frac{\left(2a+3b\right)^{2}}{a^{2}-c^{2}}=\frac{\left(2a+5b\right)^{2}}{a\left(a-6\right)},\ a=5,\ b=4,\ c=6,\ d=16,\ \text{false}$
