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Students need to solve a quadratic equation and recognise that only the positive root has physical significance. Roots are randomised with one always negative and one positive. Equation can be factorised fairly easily or the quadratic formula can be used to find the solution. Advice gives solution by factorisation.
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England schools
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England university
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Scotland schools
Taxonomy: mathcentre
Taxonomy: Kind of activity
Taxonomy: Context
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History
Don Shearman 1 year, 1 month ago
Published this.Don Shearman 2 years, 2 months ago
Created this.There is only one version of this question that you have access to.
There is one other version that you do not have access to.
| Name | Type | Generated Value |
|---|
| a | integer |
30
|
||||
| b | integer |
-20
|
||||
| energy | integer |
150
|
Generated value: integer
This variable doesn't seem to be used anywhere.
Parts
Gap-fill
Ask the student a question, and give any hints about how they should answer this part.
In order to produce a quantity x of a certain electronic component an amount of energy, E is required where
E={x2+{b+a}x+{ab+energy}} Joules
If the energy used during a production run of this component was {energy} Joules, how many of the components were produced?
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