QUESTION IMAGE
Question
write the quadratic equation whose roots are 5 and -6, and whose leading coefficient is 2.
(use the letter \\(x\\) to represent the variable.)
\\\box = 0\\
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Quadratic Equation Construction",
"Factored Form of Quadratics"
],
"current_concepts": [
"Quadratic Equation Construction",
"Factored Form of Quadratics"
]
}
</pre_analysis>
<reasoning>
Set up the factored form of the quadratic equation
\[
a(x - r_1)(x - r_2) = 0
\]
\[
a = 2,\quad r_1 = 5,\quad r_2 = -6
\]
Substitute the given values into the equation
\[
2(x - 5)(x - (-6)) = 0
\]
\[
2(x - 5)(x + 6) = 0
\]
Expand and simplify the expression
\[
2(x^2 + 6x - 5x - 30) = 0
\]
\[
2(x^2 + x - 30) = 0
\]
\[
2x^2 + 2x - 60 = 0
\]
</reasoning>
<answer>
Write the quadratic equation whose roots are 5 and \(-6\), and whose leading coefficient is 2.
(Use the letter \(x\) to represent the variable.)
<blank>\(2x^2+2x-60\)</blank> \(= 0\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Quadratic Equation Construction"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Quadratic Equation Construction",
"Factored Form of Quadratics"
],
"current_concepts": [
"Quadratic Equation Construction",
"Factored Form of Quadratics"
]
}
</pre_analysis>
<reasoning>
Set up the factored form of the quadratic equation
\[
a(x - r_1)(x - r_2) = 0
\]
\[
a = 2,\quad r_1 = 5,\quad r_2 = -6
\]
Substitute the given values into the equation
\[
2(x - 5)(x - (-6)) = 0
\]
\[
2(x - 5)(x + 6) = 0
\]
Expand and simplify the expression
\[
2(x^2 + 6x - 5x - 30) = 0
\]
\[
2(x^2 + x - 30) = 0
\]
\[
2x^2 + 2x - 60 = 0
\]
</reasoning>
<answer>
Write the quadratic equation whose roots are 5 and \(-6\), and whose leading coefficient is 2.
(Use the letter \(x\) to represent the variable.)
<blank>\(2x^2+2x-60\)</blank> \(= 0\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Quadratic Equation Construction"
]
}
</post_analysis>