1. Prerequisite Skills VOCABULARY CHECK Copy and complete the statement. ANSWER –9, 9 1. The square roots of 81 are ? and ?. 2. In the expression 2 5, the exponent is ?. ANSWER 5 3. For the polynomial function whose graph is shown, the sign of the leading coefficient is ?. ANSWERpositive

2. Prerequisite Skills Simplify the expression. 4. 15x 3 y –1 5x2y5x2y ANSWER 3x3x y2y2 9 4xy 5 5. 24x –3 y –2 32x –3 y 4 9y9y 3x3x ANSWER 8x 15 y9y9 6. 2x 5 y –3 –3 SKILL CHECK

3. Prerequisite Skills Solve the equation for y 7. –2x – 5y = 10 9. 8x – 4xy = 3 ANSWER y = 3x + 3 ANSWER y = – x – 2 2 5 8. x – y = – 1 1 3 ANSWER y = – + 2 4x4x 3 SKILL CHECK

4. Prerequisite Skills Graph the polynomial function. 10. f (x) = x 3 – 4x + 6 11. f (x) = – x 5 + 7x 2 + 2 12. f (x) = x 4 – 4x 2 + x ANSWER SKILL CHECK