Use the quadratic formula and this works every time as some quadratics do
not factorise into brackets with whole numbers.
You may use the formula to find the whole numbers in the brackets by
reversing the sign of your solutions and putting them in the two brackets.
Click Fug if you need help to remember the technique.
Take care when substituting the values as remember negatives can prove to
be problems, particularly the value of b.
Put brackets around substituted values to help avoid problems.
Click Fug for help with Negatives