Question

What is the correct answer can you guys help me please pl

Answer 1

First of all, solve the second parenthesis: if we raise a product to a certain power, it is the same as raising each factor to that power:

$(4x)^3 = 4^3\cdot x^3 = 64x^3$

So, the expression becomes

$5x^3\cdot 64x^3$

Now, we multiply the numeric parts:

$5\cdot 64 = 320$

and the literal part:

$x^3\cdot x^3 = x^{3+3} = x^6$

So, the answer is $320x^6$