Added Aug 1 2010 by Danial in Mathematics. You can also solve quadratic equations by using the Quadratic Formula and by Factoring. We always try to find out two numbers whose sum is b and whose product is c.
That is using square roots.
Square of x can be written as x2 and x cube as x3 and all power can be written as such. Factoring using the quadratic formula and completing the square. Linear and Quadratic equation solver. Well this one actually can be solved with substitution because 2y plus six needs to be equal to X but then we also that X is equal to Y squared minus nine.