Associative property of multiplication means that it doesn't matter where the parentheses are placed because it will still be the same answer.
So your answer would be 1, 4 x (3 x 6) = (4 x 3) x 6
I hope this helps!
Answer:
81
Step-by-step explanation:
9 x 9 = 81
So, 81 is the perfect square.