To distribute and simplify \((5 + 6x)(2x^2 - 3x^3 + 3x + 3)\) using the box method, we will set up the table as follows:
Table Setup:
| | \(2x^2\) | \(-3x^3\) | \(3x\) | \(3\) |
|------------|------------|-------------|---------|-----------|
| \(5\) | \(10x^2\) | \(-15x^3\) | \(15x\) | \(15\) |
| \(6x\) | \(12x^3\) | \(-18x^4\) | \(18x^2\) | \(18x\) |
Now, let's compute each term in the box:
-
Top Row
- For \(5 \cdot 2x^2\):
\[
5 \cdot 2x^2 = 10x^2
\]
- For \(5 \cdot -3x^3\):
\[
5 \cdot -3x^3 = -15x^3
\]
- For \(5 \cdot 3x\):
\[
5 \cdot 3x = 15x
\]
- For \(5 \cdot 3\):
\[
5 \cdot 3 = 15
\]
-
Bottom Row
- For \(6x \cdot 2x^2\):
\[
6x \cdot 2x^2 = 12x^3
\]
- For \(6x \cdot -3x^3\):
\[
6x \cdot -3x^3 = -18x^4
\]
- For \(6x \cdot 3x\):
\[
6x \cdot 3x = 18x^2
\]
- For \(6x \cdot 3\):
\[
6x \cdot 3 = 18x
\]
Results in Each Cell of the Box:
| | \(2x^2\) | \(-3x^3\) | \(3x\) | \(3\) |
|---------------|-----------------|-----------------|----------------|---------------|
| \(5\) | \(10x^2\) | \(-15x^3\) | \(15x\) | \(15\) |
| \(6x\) | \(12x^3\) | \(-18x^4\) | \(18x^2\) | \(18x\) |
Combine Like Terms:
Now let's combine all the terms from the box:
-
\(x^4\) terms:
\[
-18x^4
\]
-
\(x^3\) terms:
\[
-15x^3 + 12x^3 = -3x^3
\]
-
\(x^2\) terms:
\[
10x^2 + 18x^2 = 28x^2
\]
-
\(x\) terms:
\[
15x + 18x = 33x
\]
-
Constant term:
\[
15
\]
Final Simplified Expression:
Putting it all together, the final expression is:
\[
-18x^4 - 3x^3 + 28x^2 + 33x + 15
\]
So, the simplified answer is:
\[
\boxed{-18x^4 - 3x^3 + 28x^2 + 33x + 15}
\]