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Try to answer the following questions here:

  • What is this question used for?
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Checkpoint description

Describe what's changed since the last checkpoint.

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Christian Lawson-Perfect 4 months ago

Saved a checkpoint:

Replaced JavaScript marking with pattern restrictions.

Restore this checkpoint

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Christian Lawson-Perfect 2 years, 1 month ago

Gave some feedback: Ready to use

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Christian Lawson-Perfect 2 years, 1 month ago

Saved a checkpoint:

I've changed the parts so:

  • part a always has two negative roots
  • part b always has one positive root and one negative
  • part c is the difference of two squares.

I don't think there was any point in the version which had a constant on the RHS.

I've added a marking script to check that the student's answer is factorised, rather than using string restrictions.

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Elliott Fletcher 2 years, 1 month ago

Published this.

Hannah Aldous 2 years, 2 months ago

Gave some feedback: Needs to be tested

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Christian Lawson-Perfect 2 years, 2 months ago

Gave some feedback: Has some problems

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Christian Lawson-Perfect 2 years, 2 months ago

Saved a checkpoint:

You need to write a feedback message to show when the student doesn't use brackets.

I got $x^2-16$ for part b, which I'd solve by noticing it's the difference of two squares. Can you make sure the coefficient $x$ is non-zero?

I'd spin part b into its own question: first factorise, then write down the roots.

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Hannah Aldous 2 years, 2 months ago

Gave some feedback: Needs to be tested

Vicky Hall 2 years, 2 months ago

I think this question should be renamed to 'factorising quadratic equations with $x^2$ coefficient $1$, and your other question (Factoring quadratics with larger coefficients) should be renamed 'factorising quadratic equations with $x^2$ coefficient greater than $1$.

There should be another line in the statement that shows how to solve the equation if it factorises to $(x+m)(x+n)=0$, as you ask the student to solve in the final part of the question. 

In part a), I think it's a good idea to have a difference of two squares example to get students to think about how the equation can sometimes look a bit different. However, I think this should be moved to a subpart iii), and subpart i) should have a straightforward quadratic that looks exactly like the general form $ax^2+bx+c$.

Vicky Hall 2 years, 2 months ago

Gave some feedback: Has some problems

Hannah Aldous 2 years, 2 months ago

Gave some feedback: Needs to be tested

Lauren Richards 2 years, 2 months ago

Gave some feedback: Has some problems

Lauren Richards 2 years, 2 months ago

  • MAIN PARTS
  • There is a "$" sign in the statement. 
  • MAYBE suggest the form to answer the question in in part a) but then again if they have read the statement, they should know which form to have it in so up to you really. 
  • I think you should put a full stop after the formula in part b) and then start "input" with a capital letter. 
  • ADVICE
  • No comma needed after "obtain" in part a)i).
  • Part b is fine! 
  • Great question!

Hannah Aldous 2 years, 2 months ago

Gave some feedback: Needs to be tested

Hannah Aldous 2 years, 2 months ago

Created this.
Name Status Author Last Modified
Factorising Quadratic Equations with $x^2$ Coefficients of 1 Ready to use Hannah Aldous 20/05/2019 13:04
Solving Quadratic Equations with $x^2$ Coefficients of 1 by Factorising Should not be used Hannah Aldous 27/07/2017 16:29
Katherine's copy of Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Katherine Tomlinson 02/08/2017 12:44
Peter's copy of Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Peter Knowles 12/09/2017 12:29
MATH6058 Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Catherine Palmer 25/01/2018 09:16
Ida's copy of Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Ida Landgärds 13/04/2018 09:15
Ida's copy of Solving Quadratic Equations with $x^2$ Coefficients of 1 by Factorising Doesn't work Ida Landgärds 19/04/2018 12:00
løs og faktorisere andregradslikninga draft Ida Landgärds 13/04/2018 10:54
spørsmål 6 draft Ida Landgärds 23/11/2018 10:14
Blathnaid's copy of spørsmål 6 draft Blathnaid Sheridan 15/08/2018 10:53
Blathnaid's copy of spørsmål 6 draft Blathnaid Sheridan 15/08/2018 10:55
Blathnaid's copy of spørsmål 6 draft Blathnaid Sheridan 15/08/2018 11:00
Ed's copy of Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Ed Southwood 31/10/2018 12:26
Factorising Quadratic Expressions draft Ed Southwood 05/11/2018 12:00
Simon's copy of Factorising Quadratic Equations with $x^2$ Coefficients of 1 draft Simon Thomas 07/03/2019 09:52
what the heck? draft John Wick 30/05/2019 11:33
Factorizing Quadratic Equations with $x^2$ Coefficients of 1 draft Xiaodan Leng 10/07/2019 21:45
Factorizing Quadratic Equations with $x^2$ Coefficients of 1 draft Xiaodan Leng 10/07/2019 21:45
F11MTC - Topic 3 - Quadratic Equations 2 draft Oscar Siles Brugge 11/09/2019 13:36

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This question is used in the following exams: