Question

II. JUIVE UC TUNTUwig.
1. Add: 9x2 + 8xy - 9y2, 5x2 - 6xy + 9y2 and -8x2 + 3xy – 4y2​

Answer 1

$9 {x}^{2} + 8xy - 9 {y}^{2} + 5 {x}^{2} - 6xy + 9 {y}^{2} - 8 {x}^{2} + 3xy - 4 {y}^{2} \\ \\ 9 {x}^{2} - 8 {x }^{2} + 8xy - 6xy + 3xy - 4 {y}^{2} \\ \\ {x}^{2} + 5xy - 4 {y}^{2}$

Answer 2

x2+5xy-4y2 .........................