Merkwaardige producten (MP)

Bereken de volgende merkwaardige producten

\((5q-1)(5q+1)\)

\((\color{blue}{5q}\color{red}{-1})(\color{blue}{5q}\color{red}{+1})=\color{blue}{(5q)}^2-\color{red}{(-1)}^2=25q^2-1\)