Question

(14ab-9a²-3b²)-(-3a²+5ab-4b²)
Очень срочно!!!

Answer 1

$(14ab-9a²-3b²)-(-3a²+5ab-4b²) = 14ab-9a²-3b² + 3 {a}^{2} - 5ab + 4 {b}^{2} = 9ab - 6 {a}^{2} + {b}^{2}$