Inleiding veeltermen

\(4ab-4b-15\text{ [met a = -4 en b = -4]}\)

\(\begin{align} 4ab-4b-15&=4.a.b-4.b-15 \text{ [met a = -4 en b = -4]}\\&=4.(-4).(-4)-4.(-4)-15\\&=65\\ \end{align}\)