Which of the following equations is quadratic?
xx² + 1) = 0
5(4x + 2) = 3
(x+3)(x + 4) = 5

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)