Paper 1

Solve:
(a) quadratic equations:

• by factorisation
• by completing the square
• by using the quadratic formula

• in one variable
• and interpret the solution graphically

Solve:
Equations in two unknowns:

• one of which is linear and one of which is quadratic
• algebraically or graphically.

• To avoid unnecessary assumptions the binomial denominators should be linear expressions.
• Completing the square is necessary in the teaching process to determine the turning point of a parabola.
• Solving quadratic equations by completing the square will not be examined.
• Solution of non-quadratic inequalities should be seen in context of the graphs of functions.
  For example:
  Determine the value(s) if x for which:
  
  (The solution to this question should be read off the graph of the two functions.)