State the number of complex roots, the number of positive real roots and the number of negative real roots of x^4-x^3-6x+3=0

Me because some of question i don’t understand

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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?