2 - First degree factor - Easy

Find if the item is the multiplication x+1 or x-1

4 - First degree factor - Medium difficulty

Find if the element is the multiplication of an integer number by the target expression. Use of the HCF

8 - Common factor - Easy

Find if x+1 or x-1 is a common factor of the item

12 - Simplification of the algebraic fraction of first degree polynomials - Easy

Tell if the algebraic fraction produces 1 or -1