Show that (3x−1)(4x+3)(x−k)=12x3+(5−12k)x2−(3+5k)x+3k(3x - 1)(4x + 3)(x - k) = 12x^3 + (5 - 12k)x^2 - (3 + 5k)x + 3k(3x−1)(4x+3)(x−k)=12x3+(5−12k)x2−(3+5k)x+3k for all values of xxx.
225 exam-style questions on Eduqas GCSE Maths Expanding Triple Brackets. Each one has a worked solution and a mark scheme showing where the marks go.