1. Prerequisite Skills VOCABULARY CHECK Copy and complete the statement. ? Terms that have the same variable part are called 1. like terms ANSWER zero ANSWER 2. For a function f(x), a(n) is an x- value for which f(x) = 0. ?

2. 3. 121, 77 Prerequisite Skills SKILLS CHECK Find the greatest common factor of the pair of numbers. 4. 96, 32 6. 12, 56 5. 81, 42 11 ANSWER 32 ANSWER 3 4

3. 7. 3x +(– 6x) Prerequisite Skills SKILL CHECK Simplify the expression. 8. 5 + 4x + 2 –3x ANSWER 4x + 7 ANSWER 9. 4(2x – 1) + x 9x – 4 ANSWER 10. – (x + 4) – 6x – 7x – 4 ANSWER

4. Prerequisite Skills SKILL CHECK Simplify the expression. 13. (x 5 ) 3 14. (– x) 3 11. (3xy) 3 27x 3 y 3 ANSWER 12. xy 2 xy 3 x2y5x2y5 ANSWER x 15 ANSWER –x3–x3