The quadratic formula for a quadratic equation ... It is not possible to find the square root of a negative number, so the equation has no real solutions. The graph of \(y = x^2 + 2x + 5\) does ...

Polynomials are equations ... into the quadratic formula familiar to many high school math students. This approach, using roots of numbers called "radicals," was later extended to solve three ...

Approximate solutions to more complex equations can be found using a process called iteration. Iteration means repeatedly carrying out a process. To solve an equation using iteration, start with ...