**2.3c Cari Hasil Tambah Punca (HTP) dan Cari Hasil Darab Punca (HDP) bagi suatu Persamaan Kuadratik (Contoh)**

**Contoh**

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Punca-punca bagi 2

*x*^{2}+ 3*x*– 1 = 0 adalah*α*dan*β*. Cari nilai-nilai berikut:$\begin{array}{l}\text{(a)}\left(\alpha +1\right)\left(\beta +1\right)\\ \text{(b)}\frac{1}{\alpha}+\frac{1}{\beta}\\ \text{(c)}{\alpha}^{2}\beta +\alpha {\beta}^{2}\\ \text{(d)}\frac{\alpha}{\beta}+\frac{\beta}{\alpha}\\ \left[Petunjuk:{\alpha}^{2}+{\beta}^{2}={\left(\alpha +\beta \right)}^{2}-2\alpha \beta \right]\end{array}$

*Penyelesaian:*