Here is a guide to finding the materials you need.
Several third-party and community sites offer "textbook-like" resources and comprehensive review notes for free. Math 30-2 Textbook Pdf Alberta
While not a textbook, "The KEY" study guide is often used as a replacement. Here is a guide to finding the materials you need
: Principles of Mathematics 12 by Nelson is the standard resource. It covers the required units on logical reasoning, probability, and functions. Math 30-2 Textbook Pdf Alberta
Good luck on your diploma exam, Alberta!