For instance, if you're working on the homework in the "Solving by Factoring" section, then you know that you're supposed to solve by factoring.
But in the chapter review and on the test, you don't know from which of your textbook's section a particular quadratic has been drawn. You could use the Quadratic Formula for everything, but the Formula can be time-consuming overkill.
Such vector images are easily scaled while maintaining sharp, crisp images.
As a first approximation, the logo is deconstructed and approximated as 2 parabolic curves of the form The nature of roots of a quadratic equation can be determined by observing the quadratic formula closely.
If the Mc Donald's logo were stored as a set of pixels, enlargement would quickly result in distorted or pixelated images, which are an eyesore.
As such, companies often make vector images of their logos, in which the information is stored as mathematical formulae.
Quadratic equations are also needed when studying lenses and curved mirrors.
And many questions involving time, distance and speed need quadratic equations.
If there are no solutions - the graph being above the x-axis - instead of solutions, the word, Maths is challenging; so is finding the right book.
K A Stroud, in this book, cleverly managed to make all the major topics crystal clear with plenty of examples; popularity of the book speak for itself - 7 This is the best book available for the new GCSE(9-1) specification and i GCSE: there are plenty of worked examples; a really good collection of problems for practising; every single topic is adequately covered; the topics are organized in a logical order.