When would I use the quadratic formula?
You would use the quadratic formula when trying to find the value of a variable such as x in a quadratic equation but it can not be successfully factorised with whole numbers. Treating the the equation in the form ax2+bx+c=0 then putting the values into the equation, two values of x will be found from switching the sign in the equation.
EO
Related Maths GCSE answers
All answers ▸Expand and Simplify (5x - 2y)^2
make a the subject of p = (3a+5)/(4-a)
Solve: x^2 + x - 12 = 0
(This was taken from a GCSE past paper)A bag of 24 spoons costs £19.95. A box of 18 forks costs £15.55. Bags and boxes cannot be split. Gregor decides to buy the same number of spoons as forks. He places an order to buy the smallest number of each