QUESTION IMAGE
Question
factor.
\\9y^2 - 25x^2\\
<pre_analysis>
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"step_cot",
"blank_filling_formatter",
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"tutor"
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"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Difference of Squares",
"Factoring Binomials"
],
"current_concepts": [
"Difference of Squares",
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</pre_analysis>
<reasoning>
Identify the structure of the binomial
The given expression is:
\[ 9y^2 - 25x^2 \]
Both terms are perfect squares separated by a subtraction sign, which represents a difference of squares.
Express each term as a perfect square
We rewrite each term in the form \(a^2 - b^2\):
\[ 9y^2 = (3y)^2 \]
\[ 25x^2 = (5x)^2 \]
Thus, the expression becomes:
\[ (3y)^2 - (5x)^2 \]
Apply the difference of squares formula
The difference of squares formula is:
\[ a^2 - b^2 = (a - b)(a + b) \]
Substituting \(a = 3y\) and \(b = 5x\):
\[ (3y - 5x)(3y + 5x) \]
</reasoning>
<answer>
Factor.
\(9y^2 - 25x^2 = \) <blank>\((3y - 5x)(3y + 5x)\)</blank>
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Difference of Squares"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"tutor"
],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Difference of Squares",
"Factoring Binomials"
],
"current_concepts": [
"Difference of Squares",
"Factoring Binomials"
]
}
</pre_analysis>
<reasoning>
Identify the structure of the binomial
The given expression is:
\[ 9y^2 - 25x^2 \]
Both terms are perfect squares separated by a subtraction sign, which represents a difference of squares.
Express each term as a perfect square
We rewrite each term in the form \(a^2 - b^2\):
\[ 9y^2 = (3y)^2 \]
\[ 25x^2 = (5x)^2 \]
Thus, the expression becomes:
\[ (3y)^2 - (5x)^2 \]
Apply the difference of squares formula
The difference of squares formula is:
\[ a^2 - b^2 = (a - b)(a + b) \]
Substituting \(a = 3y\) and \(b = 5x\):
\[ (3y - 5x)(3y + 5x) \]
</reasoning>
<answer>
Factor.
\(9y^2 - 25x^2 = \) <blank>\((3y - 5x)(3y + 5x)\)</blank>
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Difference of Squares"
]
}
</post_analysis>