Question

2(x+y)2-9(x+y)-5 what are the answers ​

Answer 1

$4x + 4y - 9x - 9y - 5 = 0 \\ - 5x - 5y = 5 \\ x + y = - 1$

Answer 2

4(x+y)-9(x+y)-5

4x+4y-9x-9y-5

-5x-5y-5

5(x-y-1)