Answer:
-6x²+xy-6y²
Step-by-step explanation:
3y² - 4x² + xy - 2x² - 9y²
-4x²+ xy - 2x² - 6y²
-6y² + xy - 6y²
−6x² + xy − 6y²
Simplify 3y²-4x² + xy - 2x² - 9y²
Step 1
Subtract 9y² from 3y²
−4x² +xy −2x² −6y²
Step 2
Subtract 2x² from −4x²
