Answer:
-2x^2 + 6x + 4
Step-by-step explanation:
We are subtracting whole of 7x^2 + 4x - 9) so we put it into parentheses. So we have:-
5x^2 + 10x - 5 - (7x^2 + 4x - 9)
First distribute the negative over the parentheses
= 5x^2 + 10x - 5 - 7x^2 - 4x + 9
Now bring like terms together and simplify:-
= 5x^2 - 7x^2 + 10x - 4x - 5 + 9
= -2x^2 + 6x + 4 (answer)
