p= - 2
q = 3/5
p ² + 2 . pq =
[tex] {( - 2)}^{2} + 2. - 2. \frac{3}{5} = \\ [/tex]
[tex]( - 2).( - 2) - 4 \times \frac{3}{5} = \\ [/tex]
[tex]4 - \frac{12}{5} = \\ [/tex]
[tex] \frac{16 - 12}{5} = \\ [/tex]
[tex] \frac{4}{5} = 0.8 \\ [/tex]
