Learn how to solve Quadratic Equations with Complex Roots

Key Points

The discriminant tells us whether a quadratic equation will have 0, 1 or 2 real roots (solutions)

The terms ‘solutions’ and ‘roots’ are often used interchangeably

In the case where there are 0 real roots there will be complex roots

We can use the quadratic formula to find complex roots 

Complex roots use imaginary numbers

Imaginary numbers are built from the imaginary unit, i

i is equal to the square root of -1

Learn more about our Complex Numbers course here

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