High School

Simplify the expression: [tex]\left(4 x^3\right)^3[/tex]

A. [tex]64 x^9[/tex]
B. [tex]4 x^9[/tex]
C. [tex]12 x^9[/tex]
D. [tex]4 x^6[/tex]

Answer :

To simplify the expression [tex]\((4x^3)^3\)[/tex], follow these steps:

1. Understand the Expression: The expression [tex]\((4x^3)^3\)[/tex] means you are taking the entire term [tex]\(4x^3\)[/tex] to the power of 3.

2. Apply the Power of a Product Rule: The power of a product rule states that [tex]\((ab)^n = a^n \cdot b^n\)[/tex]. In our expression, apply it as follows:

[tex]\[
(4x^3)^3 = (4)^3 \cdot (x^3)^3
\][/tex]

3. Calculate [tex]\(4^3\)[/tex]: Multiply 4 by itself three times:

[tex]\[
4^3 = 4 \times 4 \times 4 = 64
\][/tex]

4. Calculate [tex]\((x^3)^3\)[/tex]: Use the power of a power rule, which states that [tex]\((a^m)^n = a^{m \cdot n}\)[/tex]:

[tex]\[
(x^3)^3 = x^{3 \cdot 3} = x^9
\][/tex]

5. Combine the Results: Put together the results from step 3 and step 4:

[tex]\[
64 \cdot x^9
\][/tex]

Thus, the simplified expression is [tex]\(64x^9\)[/tex].

The correct answer is (A) [tex]\(64x^9\)[/tex].