Answer:
-2x-2y
Explanation:
(-5x+4y) - (-3x+6y)
Remove unnecessary parentheses
-5x+4y - (-3x+6y)
When there is a - infront of an expression in parentheses change the sign of each term in the expression
-5x+4y+3x-6y
Colllect all like terms
-2x+4y-6y
-2x-2y