Factor the following expression: x^2-9
Monday, July 19th, 2010
Solution:
First recognize that this is in the form of (x2-a2), which can always be factored as (x+a)(x-a). If you multiply these two terms, you get x2-ax+ax-a2, which is equal to x2-a2.
So in this case, we can see that a=3,
so x2-9
= x2-32
= (x+3)(x-3)
Tags: 9th Grade, Algebra Answers, Algebra Homework, Math, Math Answers
Posted in 9th Grade, Algebra Homework, Homework Answers, Math Answers.
Posted in 9th Grade, Algebra Homework, Homework Answers, Math Answers.
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