Lettervormen getalwaarde

Bereken de getalwaarde

\(4a^2+3b\text{ [met a = -2 en b = -1]}\)

\(\begin{align} 4a^2+3b&=4.a^2+3.b \text{ [met a = -2 en b = -1]}\\&=4.(-2)^2+3.(-1)\\&=13\\ \end{align}\)