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8-3 Multiplying Binomials. Objective: multiply a binomial by a binomial. 8-3 Multiplying Binomials. Distributive : (2x+ 4)(3x - 7) Easiest way to distribute to multiply like you would : 342 2x + 4 ∙ 21 ∙ 3x – 7
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8-3 Multiplying Binomials Objective: multiply a binomial by a binomial
8-3 Multiplying Binomials • Distributive: • (2x+ 4)(3x - 7) Easiest way to distribute to multiply like you would: • 342 2x + 4 • ∙ 21 ∙ 3x – 7 • You can always do it this way NO MATTER how many terms in polynomials.
5 – 4 Multiplying Binomials Mentally • Example: (2x + 5)(3x – 4)
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5)(3x – 4) • F • O • I • L
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5) (3x – 4) • F-irst terms • O • I • L
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5) (3x – 4) • F-irst terms • O-outside • I • L
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5) (3x – 4) • F-irst terms • O-outside • I-inside • L
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5) (3x – 4) • F-irst terms • O-outside • I-inside • L-ast
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5)(3x – 4) • F-irst terms • O-outside Like terms ALWAYS get combined • I-inside • L-ast
5 – 4 Multiplying Binomials Mentally • Example 1: (2x + 5)(3x – 4) • F-irst terms • O-outside Like terms ALWAYS get combined • I-inside • L-ast • P. 500 Got It #3 a, b, c
8-3 Multiplying Binomials • Homework: p. 501 9 - 27 ODDS