These chapters from Mr Santowski will help you with the quadratics material that we will cover.
Nelson10 Chap31 Quadratic Relations
Nelson10 Chap32 Props of Quad Relations
Nelson10 Chap34 Role of Zeroes in Quad Relations
Nelson10 Chap36 Quad Regression
Nelson10 Chap37 Std Form of Quad Relations
Nelson10 Chap38 Factoring Quad Expressions
Nelson10 Chap39 Prob Solving with Quad Equations