<PRE><B>Question 429216</B>
Find the LCM - 21c^7a^9,7c^6a^6,15c^9a^7
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Write each monomial is prime factor form:
-21c^7a^9 = -3*7c^7a^9
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7c^6a^6 is in prime factor form
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15c^9a^7 = 3*5c^9a^7
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The LCM must have each factor in its highest power:
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LCM = -3*5*7a^9c^9 = -105a^9c^9
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Cheers,
Stan H.</PRE>