Question

Add: 5x² – 3xy + 4y² – 9 and 7y² + 5xy – 2x² + 13​

Answer 1

Step-by-step explanation:

$2 {x - 3xy}^{} + 4 {y}^{2} - 9 \\ 2 {x}^{2} + 5xy + 7 {y}^{2} + 13 \\ = 3 {x}^{2} + 2xy + 11 {y}^{2} + 4$

I hope my answer help you