Vieta's Formula for Quadratics: Find the Sum of the Square of the Roots

This video explains how to use Vieta's Formula for quadratic equations to determine the value of an expression involving the roots.

[blackdark]

Thanks!!! With this video people can understand this theme

[alster]

Solved it on my own and got it in less than a minute

[MyOneFiftiethOfADollar]

Unless, you show viewers where vieta’s formulas originate, just find roots directly and then square and sum.

[pinguinde]

It's just normal maths using Relation b/n roots and coefficients
What is then Vieta's formula????