$$\quad ( 2.5 l - 0.5 m ) ( 2.5 l + 0.5 m )$$
$\frac{25l^{2}-m^{2}}{4}$
$$\left(2.5l\right)^{2}-\left(0.5m\right)^{2}$$
$$2.5^{2}l^{2}-\left(0.5m\right)^{2}$$
$$6.25l^{2}-\left(0.5m\right)^{2}$$
$$6.25l^{2}-0.5^{2}m^{2}$$
$$6.25l^{2}-0.25m^{2}$$
Show Solution
Hide Solution
