(2)3/2+ followed by the number 13, 3/2- root number 13.

(3) Negative 3: 7, 1, negative 3: 4, negative 3: 7.

If ax*+bx+c=0(a≠0) has two x 1, x2, then x1+x2 = negative b of a, x2 = a = a of a.

* stands for square.