Pls Some one help me with this

What is the value of the product (3-2i)(3+2i)?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set.a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}