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express the following polynomial in expanded form and simplify complete…

Question

express the following polynomial in expanded form and simplify completely.
\\p(x) = (4x - 1)^3\\

Explanation:

Response

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Binomial Theorem",
"Binomial Expansion"
],
"new_concepts": [],
"current_concepts": [
"Binomial Theorem",
"Binomial Expansion",
"Polynomial Expansion"
]
}
</pre_analysis>

<reasoning>

Apply the binomial expansion formula for a cube

\[
(a - b)^3 = a^3 - 3a^2b + 3ab^2 - b^3
\]

Substitute the terms into the formula

\[

$$\begin{aligned} a &= 4x \\ b &= 1 \\ p(x) &= (4x)^3 - 3(4x)^2(1) + 3(4x)(1)^2 - (1)^3 \end{aligned}$$

\]

Simplify each term completely

\[

$$\begin{aligned} (4x)^3 &= 64x^3 \\ -3(16x^2)(1) &= -48x^2 \\ 3(4x)(1) &= 12x \\ -(1)^3 &= -1 \\ p(x) &= 64x^3 - 48x^2 + 12x - 1 \end{aligned}$$

\]
</reasoning>

<answer>
\(p(x) = 64x^3 - 48x^2 + 12x - 1\)
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Binomial Expansion"
]
}
</post_analysis>

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Binomial Theorem",
"Binomial Expansion"
],
"new_concepts": [],
"current_concepts": [
"Binomial Theorem",
"Binomial Expansion",
"Polynomial Expansion"
]
}
</pre_analysis>

<reasoning>

Apply the binomial expansion formula for a cube

\[
(a - b)^3 = a^3 - 3a^2b + 3ab^2 - b^3
\]

Substitute the terms into the formula

\[

$$\begin{aligned} a &= 4x \\ b &= 1 \\ p(x) &= (4x)^3 - 3(4x)^2(1) + 3(4x)(1)^2 - (1)^3 \end{aligned}$$

\]

Simplify each term completely

\[

$$\begin{aligned} (4x)^3 &= 64x^3 \\ -3(16x^2)(1) &= -48x^2 \\ 3(4x)(1) &= 12x \\ -(1)^3 &= -1 \\ p(x) &= 64x^3 - 48x^2 + 12x - 1 \end{aligned}$$

\]
</reasoning>

<answer>
\(p(x) = 64x^3 - 48x^2 + 12x - 1\)
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Binomial Expansion"
]
}
</post_analysis>