Some quadratics cannot be factorised. An alternative method to solve a quadratic equation is to complete the square. To solve an equation of the form \(x^2 + bx + c = 0\) consider the expression ...

Mathematicians once turned up their noses at imaginary numbers. But complex analysis actually simplifies math and physics.

However, if you are willing to believe in the existence of square roots of negative numbers, you will get solutions to a whole new set of quadratic equations.

Maybe your high school teacher didn't want to deal with the issue of what happens when (b 2 —4ac)—the expression under the ...