AQA C4 2008 June — Question 1

Exam BoardAQA
ModuleC4 (Core Mathematics 4)
Year2008
SessionJune
TopicFactor & Remainder Theorem
TypeDirect remainder then factorise

1 The polynomial \(\mathrm { f } ( x )\) is defined by \(\mathrm { f } ( x ) = 27 x ^ { 3 } - 9 x + 2\).
  1. Find the remainder when \(\mathrm { f } ( x )\) is divided by \(3 x + 1\).
    1. Show that f \(\left( - \frac { 2 } { 3 } \right) = 0\).
    2. Express \(\mathrm { f } ( x )\) as a product of three linear factors.
    3. Simplify $$\frac { 27 x ^ { 3 } - 9 x + 2 } { 9 x ^ { 2 } + 3 x - 2 }$$