Question

Find the difference (3-13x-7x^2)-(5x^2+ 12x-10)



A.-12x^2-25x-7

B.-12x^2-25x+13

C.-12x^2-x-7

D.3x^2-25x-2

Answer 1

3 - 13x - 7x^2 - (5x^2 + 12x - 10)
Distributing the negative over the parentheses chamges the signs:-
= 3 - 13x - 7x^2 - 5x^2 - 12x + 10
adding like terms:-
= -12x^2 - 25x + 13  (answer).

Its B