Answer:
Simplified result is - 2 xy² .
Step-by-step explanation:
Given expression is 9xy² – 11xy²
now take the common variable out from the above expression,
9xy² – 11xy²
(9 – 11) xy²
since 9 - 11 = - 2
(–2) xy²
- 2 xy²
Hence, Simplified result is - 2 xy² .