Show that (5x−k)(3x+1)(2x−7)=30x3−(6k+95)x2+(19k−35)x+7k(5x - k)(3x + 1)(2x - 7) = 30x^3 - (6k + 95)x^2 + (19k - 35)x + 7k(5x−k)(3x+1)(2x−7)=30x3−(6k+95)x2+(19k−35)x+7k for all values of xxx, giving your answer in terms of kkk.
225 exam-style questions on WJEC GCSE Maths Expanding Triple Brackets. Each one has a worked solution and a mark scheme showing where the marks go.