Answer:
18
Step-by-step explanation:
<span>The lowest common multiple is the smallest number that is a shared multiple of a set of numbers. 9 x 1 = 9, 9 x 5 = 45 and 9 x 9 = 81. The smallest common multiple is 9.</span>
It's is the Associative Property. I hope that helps!
Your answer will be (2x+1)(x+2)