Akar persamaan kuadrat 2x²-13x-7=0 Adalah A&B 2A+4B=...

[tex] {2x}^{2} - 13x - 7 = 0 \\ (2x + 1)(x - 7) = 0 \\ \\ x(a) = > \\ \: 2x + 1 = 0 \\ = > \: x (a)= - \frac{1}{2} \\ \\ x(b) \\ x - 7 = 0 \\ x (b) \: = 7 \\ \\ 2a \: + 4b \\ (2 \times ( - \frac{1}{2} )) + (4 \times 7) \\ = - 1 + 28 \\ = 27[/tex]