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OpenStudy (anonymous):
Factor out 9w-w^3
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OpenStudy (solomonzelman):
\[ 9w-w^3~~~~~~->~~~~~~~~w(9-w^2)~~~~~~->~~~~~w(3-w)(3+w)\]
OpenStudy (anonymous):
Can u please explain to me step by step please
OpenStudy (solomonzelman):
OK, sure, see how I factored out of w?
OpenStudy (anonymous):
yes
OpenStudy (solomonzelman):
after I have \[w(9-w^2) \] I know that \[a^2-b^2=(a-b)(a+b)\] 9 can be written as 3^2 so what you have is \[w(3^2-w^2)~~~~~->~~~~~w(3-w)(3+w)\] SEE?
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