8 Example 1 Find (y + 8) (y – 4) Method 1 Vertical Multiply by –4. Multiply by y.Add like terms.
9 Example 1 cont Find Method 2 Horizontal Distributive Property Multiply.Combine like terms.Answer:
10 Example 2a Find (z – 6)(z – 12) F L I O Multiply. Combine like terms. Answer:
11 Example 2b Find (5x – 4)(2x + 8) F I O L Multiply. Answer: Combine like terms.
12 Example 3Geometry The area A of a triangle is one-half the height h times the base b. Write an expression for the area of the triangle.Identify the height and the base.Now write and apply the formula.Area equals one-half height times base.Ahb
13 Example 3 cont Original formula Substitution FOIL method Multiply. Combine like terms.Distributive PropertyAnswer: The area of the triangle is square units.
14 Example 4a Find (3a + 4)(a2 – 12a + 1) Distributive Property Answer:Combine like terms.
15 Example 4b Find (2b2 + 7b + 9)(b2 + 3b – 1) Distributive Property Answer:Combine like terms.
16 Summary & Homework Summary: Homework: The FOIL method is the sum of the products of the first terms F, the outer terms O, the inner term I, and the last terms LThe Distributive Property can be used to multiply any two polynomialsHomework:Pg even