Option 2) -2a² + 3a -6 is the correct answer.
Step-by-step explanation:-
3a² -2a +5 is subtracted from a² + a -1
a² + a -1
-(3a² -2a +5)
-2a² +3a -6
Multiply the -ve sign to each term of the expression and then perform the operation.
∴ The answer is -2a² + 3a - 6
