Find the LCM.
-$7 a+21, a^{2}+3 a$
A) $7 a(a+3)$
B) $7 \mathrm{a}^{2}+3$
C) $7 a+3$
D) $7 \mathrm{a}^{2}+21$

Name: Find the LCM. -$7 a+21, a^{2}+3 a$ A) $7 a(a+3)$ B) $7 \mathrm{a}^{2}+3$ C) $7 a+3$ D) $7 \mathrm{a}^{2}+21$
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Quizplus · Accepted Answer

The LCM of $7a+21$ and $a^2+3a$ can be found by factoring each expression and then taking the product of the highest power of common factors. $7a+21$ factors to $7(a+3)$, and $a^2+3a$ factors to $a(a+3)$. The LCM is $7a(a+3)$, which is option A.

Find the LCM 7a+21,a2+3a7 a+21, a^{2}+3 a7a+21,a2+3a A) 7a(a+3)7 a(a+3)7a(a+3) B) 7a2+37 \mathrm{a}^{2}+37a2+3

Find the LCM $7 a+21, a^{2}+3 a$ A) $7 a(a+3)$ B) $7 \mathrm{a}^{2}+3$