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Dada la ecuación de segundo grado: <br /><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»#p«/mi»«mo»=«/mo»«mn»0«/mn»«/math»</span><br />Marca qué afirmación es cierta<br />
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One or multiple answers?
Multiple answers allowed
One answer only
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Number the choices?
a., b., c., ...
A., B., C., ...
1., 2., 3., ...
i., ii., iii., ...
I., II., III., ...
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Choice 1
Answer
las dos soluciones de la ecuación son #a1 y #a2
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Feedback
Muy bien.
Choice 2
Answer
las dos soluciones de la ecuación son #b1 y #b2
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Feedback
Atención, has olvidado multiplicar el 2 del denominador por el coeficiente del término cuadrático, "a", es decir, has calculado <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mrow»«mo»-«/mo»«mi»b«/mi»«mo»±«/mo»«msqrt»«mrow»«msup»«mi»b«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mo»·«/mo»«mi»a«/mi»«mo»·«/mo»«mi»c«/mi»«/mrow»«/msqrt»«/mrow»«mn»2«/mn»«/mfrac»«/math»</span> en lugar de <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mrow»«mo»-«/mo»«mi»b«/mi»«mo»±«/mo»«msqrt»«mrow»«msup»«mi»b«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mo»·«/mo»«mi»a«/mi»«mo»·«/mo»«mi»c«/mi»«/mrow»«/msqrt»«/mrow»«mrow»«mn»2«/mn»«mi»a«/mi»«/mrow»«/mfrac»«/math»</span>.
Choice 3
Answer
las dos soluciones de la ecuación son #c1 y #c2
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
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Feedback
Atención, has olvidado cambiar el signo del coeficiente de x en la fórmula per hallar las soluciones, es decir, has calculado <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mrow»«mi»b«/mi»«mo»±«/mo»«msqrt»«mrow»«msup»«mi»b«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mo»·«/mo»«mi»a«/mi»«mo»·«/mo»«mi»c«/mi»«/mrow»«/msqrt»«/mrow»«mrow»«mn»2«/mn»«mi»a«/mi»«/mrow»«/mfrac»«/math»</span> en lugar de <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mrow»«mo»-«/mo»«mi»b«/mi»«mo»±«/mo»«msqrt»«mrow»«msup»«mi»b«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mo»·«/mo»«mi»a«/mi»«mo»·«/mo»«mi»c«/mi»«/mrow»«/msqrt»«/mrow»«mrow»«mn»2«/mn»«mi»a«/mi»«/mrow»«/mfrac»«/math»</span>.
Choice 4
Answer
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None
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Feedback
Choice 5
Answer
Grade
None
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83.33333%
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66.66667%
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Feedback
Choice 6
Answer
Grade
None
100%
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83.33333%
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66.66667%
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Feedback
Combined feedback
For any correct response
For any partially correct response
Options
Show the number of correct responses once the question has finished
For any incorrect response
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33.33333%
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Hint 1
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Hint 2
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Created
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Wednesday, 12 June 2013, 1:11 PM
Last saved
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on
Wednesday, 12 June 2013, 1:11 PM
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