O-LevelAdditional MathematicsFactors of polynomials4037/22 · May/June 2010 · Q56 Marks
Solve the equation 2x³ - 3x² - 11x + 6 = 0.
- (a)Solve the equation 2x³ - 3x² - 11x + 6 = 0.[6]
Mark scheme
Marking points from the official mark scheme (May/June 2010). The mark or mark type is shown in brackets.
- M1 for Search for first root or factor
- A1 for x = -2 or 1/2 or 3 or (x + 2) or (x – 3) or (2x – 1)
- M1 for Attempt to factorise cubic (x + 2)(2x² - 7x + 3) or (x - 3)(2x² + 3x – 2) or (2x – 1)(x² − x − 6)
- A1 for Correct factorisation
- M1 for Solve 3 term quadratic
- A1 for x = -2 and 1/2 and 3
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