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Simplify the expression:

[tex]\[
\left(c+\frac{d}{e}\right)^3
\][/tex]


Sagot :

To expand and simplify the expression [tex]\(\left(c + \frac{d}{e}\right)^3\)[/tex], follow these steps:

1. Understand the Expression:
The expression given is of the form [tex]\((a + b)^3\)[/tex], where [tex]\(a = c\)[/tex] and [tex]\(b = \frac{d}{e}\)[/tex].

2. Use the Binomial Theorem:
Recall the binomial theorem for expanding [tex]\((a + b)^3\)[/tex]:
[tex]\[ (a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3 \][/tex]

3. Substitute [tex]\(a\)[/tex] and [tex]\(b\)[/tex]:
Here, substitute [tex]\(a = c\)[/tex] and [tex]\(b = \frac{d}{e}\)[/tex]:
[tex]\[ \left(c + \frac{d}{e}\right)^3 = c^3 + 3c^2\left(\frac{d}{e}\right) + 3c\left(\frac{d}{e}\right)^2 + \left(\frac{d}{e}\right)^3 \][/tex]

4. Simplify Each Term:
- The first term is simply:
[tex]\[ c^3 \][/tex]

- The second term, [tex]\(3c^2\left(\frac{d}{e}\right)\)[/tex], simplifies to:
[tex]\[ 3c^2 \cdot \frac{d}{e} = \frac{3c^2d}{e} \][/tex]

- The third term, [tex]\(3c\left(\frac{d}{e}\right)^2\)[/tex], simplifies to:
[tex]\[ 3c \cdot \left(\frac{d}{e}\right)^2 = 3c \cdot \frac{d^2}{e^2} = \frac{3cd^2}{e^2} \][/tex]

- The fourth term, [tex]\(\left(\frac{d}{e}\right)^3\)[/tex], simplifies to:
[tex]\[ \left(\frac{d}{e}\right)^3 = \frac{d^3}{e^3} \][/tex]

5. Combine All Terms:
Now, combine all the simplified terms together:
[tex]\[ \left(c + \frac{d}{e}\right)^3 = c^3 + \frac{3c^2d}{e} + \frac{3cd^2}{e^2} + \frac{d^3}{e^3} \][/tex]

Hence, the fully expanded form of [tex]\(\left(c + \frac{d}{e}\right)^3\)[/tex] is:
[tex]\[ c^3 + \frac{3c^2d}{e} + \frac{3cd^2}{e^2} + \frac{d^3}{e^3} \][/tex]

So the final answer is:
[tex]\[ c^3 + 3\frac{c^2d}{e} + 3\frac{cd^2}{e^2} + \frac{d^3}{e^3} \][/tex]