It is 4a2.
x2=(4a)(a) x=√4a2 x=2a The geometric mean of a and 4a is 2a
The answer is 4a^2.
4a*2c=8ac
4 x a
4a x 4b = 16ab Variables can be multiplied just like numbers.
4a
4a x 3
4a
30
Factor them. 2 x 2 x a = 4a 2 x 5 x a x a = 10a2 Select the common factors. 2 x a = 2a, the GCF.
10
Factor them. 2 x 2 x a = 4a 2 x 5 x a x a = 10a2 Combine the factors, eliminating duplicates. 2 x 2 x 5 x a x a = 20a2, the LCM