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OpenStudy (anonymous):
9x^2-9
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jimthompson5910 (jim_thompson5910):
Do you want to factor?
jimthompson5910 (jim_thompson5910):
if so, then... 9x^2-9 9(x^2-1) ... factor out the GCF 9 9(x - 1)(x + 1) ... use the difference of squares rule
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