Odpowiedź :
[tex]2 {a}^{2} - 2a {b}^{2} + 4 = 2 \times {( - 1)}^{2} - 2 \times ( - 1) \times {2}^{2} + 4 = 2 \times 1 - 2 \times ( - 1) \times 2 + 4 = 2 - ( - 2) \times 2 + 4 = 2 + 2 \times 2 + 4 = 2 + 4 + 4 = 10[/tex]
Pozdrowionka! ~Wika
[tex]2 {a}^{2} - 2a {b}^{2} + 4 = 2 \times {( - 1)}^{2} - 2 \times ( - 1) \times {2}^{2} + 4 = 2 \times 1 - 2 \times ( - 1) \times 2 + 4 = 2 - ( - 2) \times 2 + 4 = 2 + 2 \times 2 + 4 = 2 + 4 + 4 = 10[/tex]
Pozdrowionka! ~Wika