Wednesday, 13 March 2013

Notes for 14/3 BY JOVAN

- Use 'discriminant' instead of b^2 - 4ac.
- Question may use terms a, b or c 
- Thus b^2 - 4ac will not equate to the discriminant
- Negative inequalities have to be flipped when both sides are multiplied by negative (exception)
- When question ask for 'show that'
- Find discriminant expression
- Find a range that the discriminant always satisfies
- Link back to question (write 'shown')
- Notes for question 12b
- Expression of discriminant
- Find range of discriminant that is always true
- Link back to question and copy the right question
- Find the range of values by determining the condition of the roots

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