In Norse mythology, Hodmimir's Forest was the only place on Earth that Surt's sword was unable to destroy. As a result, the only humans who survive Ragnarok will emerge from this forest. They are Lif and Lifthrasir.
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... are also called the roots of the equation. The formula reads
<math>
x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}
</math>
The term b2 – 4ac is called the ...