Presentation on theme: "Factoring and Expanding Linear Expressions ."— Presentation transcript:
1Factoring and Expanding Linear Expressions . Students will use the distributive property to expand algebraic expressions and they will factor algebraic expressions.Factor: a number that divides evenly into another number.Greatest Common Factor (GCF): the largest number common to two or more terms.
2Greatest Common Factor (GCF) What is the greatest number that is a factor of all three of these numbers?**List the factors of each number.6: 1, 2, 3, and 69: 1, 3, and 912: 1, 2, 3, 4, 6, and 12
3Factoring and Expanding Linear Expressions You can use number properties, such as the distributive property, to help you expand or factor expressions.Example: Expand the expression 0.4(5x + 8).Step 1: Apply the distributive property.0.4(5x + 8) = (0.4 ∙ 5x) + (0.4 ∙ 8)Step 2: Simplify the expression.2.0x + 3.2
5Greatest Common Factor of Algebraic Expressions Factoring an expression means finding the GCF of all the terms and then dividing each term by that factor.Factored expressions use parentheses or other grouping symbols to show what has been factored out.So, factoring an expression is the opposite of expanding it!
6What factors do these terms have in common? Factor ExpressionsList the factors of:27a: 1, 3, 9, 27, and a45ab: 1, 3, 5, 9, 15, 45, a, and bWhat factors do these terms have in common?
7FactorExpressions Example: Factor 4 + 8m completely. Step 1: Identify the GCF of the terms 4 and 8m4: 1, 2, and 48m: 1, 2, 4, 8, and mThe greatest numerical factor common to both 4 and 8m is 4. There is no variable factor in common.Step 2: Use the distributive property to factor the expression. (Take out the GCF and rewrite the expression)4 + 8m = 4(1 + 2m)