4ac\), which comes from the quadratic formula and we can use this to ... 4ac\textgreater0\) - the roots are real and unequal ie two distinct real roots (diagram 3) ...

4ac\textgreater0\), the roots are real and unequal (diagram A) If \({b^2} - 4ac = 0\), the roots are real and equal (diagram B) If \({b^2} - 4ac\textless0\), the roots are non-real (diagram C ...