Using the quadratic formula is another method of solving quadratic equations that will not factorise. You will need to learn this formula, as well as understanding how to use it. Key fact The ...

The quadratic formula can be used to solve quadratic equations that will not factorise. You will need to learn this formula, as well as understanding how to use it. Key fact The quadratic formula ...

The imaginary number i depicts a number that somehow when multiplied by itself is negative. In high school, you may have encountered the quadratic formula, which gives solutions to equations where the ...