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Observe this imagewhen x is –3?

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The GED Mathematical Reasoning test measures your algebraic and quantitative problem-solving skills and requires you to demonstrate an understanding of mathematical concepts, the skill to use those concepts, and the ability to apply knowledge in real-world scenarios.
 


Observe this image<br><img alt='images' src='https://www.fatskills.com/images2/GED/eq01112.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:mfrac><m:mrow><m:mn>10</m:mn><m:mo>-</m:mo><m:msup><m:mi>x</m:mi><m:mn>2</m:mn></m:msup></m:mrow><m:mrow><m:msup><m:mi>x</m:mi><m:mn>2</m:mn></m:msup></m:mrow></m:mfrac></m:mrow></m:math>-→<br>What is the value of <img alt='images' src='https://www.fatskills.com/images2/GED/eq01113.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:mrow></m:math>-->when x is –3?






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