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OpenStudy (anonymous):
Find the LCM of r^2-81 and r^2+14r+45
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OpenStudy (anonymous):
r^2-81=(r+9)(r-9) r^2+14r+45=r^2+5r+9r+45 =(r+5)(r+9) so the lcm is (r+5)(r+9)(r-9)
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