Combining Radical Expressions 6-3: Binomial Radical Expressions Combine radicals which have same index and radicands. Algebra 2 Combining Radical Expressions: Sums and Differences Use the Distributive Property to add or subtract like radicals: a n x b n x a b n x 2 5 7 5 3 5 2 7 3 a n x b n x a b n x 34 7 4 7 2 4 7 34 7 7 3 1 2 4 7 4 4 7 5 6 5 Different Index; Can’t Combine Complete Got It? #1 p.375 a. Can't combine Simplifying Before Combining c. 2 5 3 x 2 b. 7 x xy Multiplying Binomial Radical Expressions Try to simplify to see if have like radicals What is the simplest form of the expression? 28 175 63 2 7 5 7 3 7 Multiply in way similar to binomial expressions which don’t contain radicals. Use the Distributive Property What is the product of the radical expression? 1 2 7 4 3 7 2 5 3 7 1 4 1 3 7 4 2 7 2 7 3 7 4 3 7 8 7 6 49 0 7 0 4 5 7 42 38 5 7 Complete Got It? #3 p.376 Rationalizing a Denominator Containing Radical Expressions Multiplying Binomial Radical Expressions 46 16 5 Complete Got It? #4 p.376 63 2 Conjugates ◦ The product of two conjugates is a rational number. Multiply both numerator and denominator by the conjugate of the denominator. Write the expression with a rationalized denominator. What is the product of the radical expression? 5 3 2 5 3 2 5 55 3 2 5 3 2 3 2 3 2 25 15 2 15 2 9 4 25 0 18 7 Complete Got It? #5 p.377 a. 24 b. 1 11 6 3 11 6 3 6 3 6 3 6 3 6 3 66 11 3 36 9 66 11 3 6 3 33 3 Complete Got It? #6 p.377 a. 21 35 b. 12 x 4 x 6 3 1 Homework: p.378 #11-35 odd, 62-64 2
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