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Observe the following function.?

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The Mathematical Reasoning section of the GED tests your ability to solve algebraic and quantitative problems. The GED Math Test contains 46 questions. Some question types include multiple-choice, drag-and-drop, hot spot, and fill-in-the-blank. The GED Math Test is 115 minutes (1 hour and 55 minutes).


Observe the following function.<br><img alt='images' src='https://www.fatskills.com/images2/GED/eq01250.png'/><!--<m:math xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mi>f</m:mi><m:mrow><m:mo>(</m:mo><m:mi>x</m:mi><m:mo>)</m:mo></m:mrow><m:mo>=</m:mo><m:msup><m:mi>x</m:mi><m:mn>2</m:mn></m:msup><m:mo>-</m:mo><m:mn>4</m:mn><m:mi>x</m:mi></m:mrow></m:math>-→<br>For what value of x does <img alt='images' src='https://www.fatskills.com/images2/GED/eq01251.png'/><!--<m:math xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mi>f</m:mi><m:mrow><m:mo>(</m:mo><m:mi>x</m:mi><m:mo>)</m:mo></m:mrow><m:mo>=</m:mo><m:mn>12</m:mn></m:mrow></m:math>-->?






 
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