Question

Verify that 2 is a zero of the polynomial x³ + 4x² − 3x − 18.

Answer 1

Let p$\left(\mathrm{x}\right)=x^3+4x^2-3x-18$

$$\begin{gathered} \mathrm{Now},p\left(\mathit{2}\right)=2^3+4\times 2^2-3\times 2-18=0 \\ \therefore 2\mathrm{is}\mathrm{a}\mathrm{zero}\mathrm{of}p\left(x\right). \end{gathered}$$