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Solve $ x^2+x-1 = 0 $ using factoring.
Answer
$$ \color{blue}{ x_1 = -\frac{ 1 }{ 2 }-\frac{\sqrt{ 5 }}{ 2 } }~~ \text{and}~~ \color{blue}{ x_2 = -\frac{ 1 }{ 2 }+\frac{\sqrt{ 5 }}{ 2 } } $$
Explanation
First we need to factor trinomial $ \color{blue}{ x^2+x-1 } $ and than we use factored form to solve an equation $ \color{blue}{ x^2+x-1 = 0} $.
Since the quadratic trinomial cannot be factored out we solved the problem using quadratic formula.
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