IB DP Maths: AA HL复习笔记2.2.3 Solving Quadratics

How do I decide the best method to solve a quadratic equation?

• If it is a calculator paper then use your GDC to solve the quadratic
• If it is a non-calculator paper then...
  • you can always use the quadratic formula
  • you can factorise if it can be factorised with integers
  • you can always complete the square

How do I solve a quadratic equation by the quadratic formula?

How do I solve a quadratic equation by completing the square?