Find the product. (7a + 8b)(7a - 8b)

Holt McDougal Larson Algebra 1 Common Core Edition page 514 number 26

Asked by Dee Dee 12 years ago 3/13/2013 12:27 PM

Last updated by anonymous 12 years ago 3/14/2013 2:50 PM

Answered by arwen46 12 years ago 3/14/2013 2:50 PM

(7a + 8b)(7a - 8b) =
7a (7a - 8b) + 8b(7a - 8b) =
49a² - 56 ab + 56ab - 64b² =
49a² - 64b²