Express x2+9x+3x^2 + 9x + 3x2+9x+3 in the form (x+a)2+b(x + a)^2 + b(x+a)2+b, where a a\,a and b b\,b are constants to be found.
8 exam-style questions on WJEC A Level Maths 1.2.4 Algebra and Functions. Each one has a worked solution and a mark scheme showing where the marks go.