k4=8-7k2

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Solution for k4=8-7k2 equation: 



k4=8-7k^2

We move all terms to the left:

k4-(8-7k^2)=0

We add all the numbers together, and all the variables

k^4-(8-7k^2)=0

We get rid of parentheses

k^4+7k^2-8=0

We do not support ekpression: k^4

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