Display type: Short answer-box
No. marks: 2
Question Part (a)
Marking step 1
Description of marks: Factorise a quadratic expression
[1 mark for taking 2 out as a common factor]
[1 mark for correctly completing the square]
[1 mark for using difference of two squares to factorise]
Option type: Multiple (checkboxes)
Marking prompt : Which of the following calculations did you perform?
Options:
- I took 2 out as a common factor.
- I used the 'complete the square' approach.
- I used the difference of two squares rule and got \(2(x-\frac{1}{4}-\frac{\sqrt{41}}{4})(x-\frac{1}{4}+\frac{\sqrt{41}}{4})=0\) as my answer.
Worked solution: