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

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