Expand product of brackets

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Newcastle University Mathematics and Statistics

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Newcastle University Mathematics and Statistics 9 years, 3 months ago

Created this.

Name	Status	Author	Last Modified
Expand product of brackets	draft	Newcastle University Mathematics and Statistics	20/11/2019 14:50
Expand product of brackets	draft	Nasir Firoz Khan	29/07/2016 15:21
Algebra II: Expand product of brackets	Ready to use	Nasir Firoz Khan	12/08/2016 15:47
Algebra II: Expand product of brackets	Ready to use	Nasir Firoz Khan	12/08/2016 16:16
Joe's copy of Expand product of brackets	draft	emma rand	27/07/2018 12:59

There are 3 other versions that do you not have access to.

Question statement

Expand the following to give a quadratic in $x$ .

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	-1
c	integer	-1
b	integer	9
d	integer	-5

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(-5..5 except 0)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `integer`

-1

→ Used by:

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Mathematical expression
  Add
1. Step Information only
2. Step Information only

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

$\simplify[std]{({a}x+{b})({c}x+{d})}=\;$ Unnamed gap.

Your answer should be a quadratic in $x$ and should not include any brackets.

You can click on "Show steps" for more information, but you will lose one mark if you do so.

Advice

Using the method given by Show steps we have:

$\begin{eqnarray*}\simplify[std]{ ({a}x+{b})({c}x+{d})}&=&\simplify[std]{{a}x*({c}x+{d})+{b}({c}x+{d})}\\&=&\simplify[std]{{a*c}x^2+{a*d}x+{b*c}x+{b*d}}\\&=&\simplify[std]{{a*c}x^2+{(a*d+b*c)}x+{b*d}}\end{eqnarray*}$

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Information only
Information only

This question is used in the following exams:

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Newcastle University Mathematics and Statistics 9 years, 3 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

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Error

Expand product of brackets

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Newcastle University Mathematics and Statistics 9 years, 3 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`