Question Part (b)
Marking step 1
Description of marks: Solve a cubic equation
[1 mark for using null factor law]
[1 mark for getting the roots]
Option type: Multiple (checkboxes)
Marking prompt : Which of the following calculations did you perform?
Options:
- I used null factor law.
- I got \(x=0\ or\ x=1\ or\ x=-3\) as the roots.
Worked solution: