Question

Add 5x² + 3y² – 9xy with -2x² + 6y² + 4xy​

Answer 1

Answer:

$3 {x}^{2} + 9 {y}^{2} - 5xy$

Step-by-step explanation:

$5 {x}^{2} + 3 {y}^{2} - 9xy + ( - 2 {x}^{2} + 6 {y}^{2} + 4xy) \\ \\ = 3 {x}^{2} + 9 {y}^{2} - 5xy$