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# help

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what is vieta's formula? I try to understand it but I can't :(

Jul 18, 2022

### 1+0 Answers

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Vieta's formula allows you to calculate the sum or product of the roots of the quadratic equation.

For example, let's say we have the quadratic $$x^2 + 6x + 8$$ (in the form $$ax^2 + bx + c$$). By Vieta's, the sum of the roots is $${-b \over a} = {-6 \over 1} = -6$$, and the products of the roots is $${c \over a} = {8 \over 1} = 8$$

Hope this helps!!

Jul 18, 2022