Explanation Given information: Given expression: ( 9 x + y ) ( 9 x − y ) . Concept Used: FOIL method is used to multiply two linear binomials. FOIL stands for "First, Outer, Inner, Last". First means first term of each binomial is multiplied. Outer means first term of first binomial and last term of second binomial is multiplied. Inner means second term of first binomial and first term of second binomial is multiplied. Last means second term of each binomial is multiplied. Product of two binomials is the sum of product obtained from First, Outer, Inner and Last. Calculations: According to given question, the expression is ( 9 x + y ) ( 9 x − y ) . Using FOIL method, we have, ⇒ F = 9 x . ( 9 x ) = 81 x 2 ⇒ O = 9 x . ( - y ) = - 9 x y ⇒ I = y

1st Edition

ISBN: 9780134654409

Author: Martin-Gay, K. Elayn, 1955-

Publisher: Pearson,

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Chapter 4.4, Problem 27ES

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To multiply the expression, (9x+y)(9x−y) .

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To multiply the expression, ( 9 x + y ) ( 9 x − y ) .

Solution Summary: The author explains how FOIL method is used to multiply two linear binomials.

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