What's the quadratic formula used for?
Firstly, it's important to understand what the formula is. It is essentially a re-arrangement of a quadratic equation, however the formula can be learnt so that it can be applied quickly within an exam context. In simple terms, the function of the formula is to find the roots of a quadratic equation. However, its function goes beyond this - the information can be taken and used in plotting a graph. The root values found are the points of interception with the X-axis. Further calculations can also be undertaken to gather more information to help in plotting the graph but this goes beyond quadratic formula.
JH
Related Maths GCSE answers
All answers ▸The point P has coordinates (3,4), Q has the coordinates (a,b), a line perpendicular to PQ is given by the equation 3x+2y=7. Find an expression for b in terms of a
How do you differentiate x^2?
I set up a tent (assume it’s a regular triangular prism) of length 2.2m. The triangular face of the tent is an isosceles triangle. The two identical sides are both 1.4m long and have an angle of 34degrees between them. Work out the volume of the tent -3sf
For what values of x is 2x^2 - 11x - 6 > 0 ?