F(x)=2x^2-5x g(x)=-3x^2 find f(2)

Can any one me with the answers to these questions asap?

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11