Cubic Formula Proof Step 4: Other Solutions of y using the Cube Root of Unity

In this video I go over the fourth step of the Cubic Formula proof which involves obtaining the complex solutions of y by considering the cube root of unity. Since the cube root of the z values from Vieta's substitution has 3 factors, we need to multiply the principle solution by the factors to obtain each separate solution. https://youtu.be/D5EQJlzgUlE - summary - playlist - notes

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