HD's higher algebra!
Algebra
Level
3
Find the positive real root of the equation given below:
X^{4}-2X^{2}+X=380
The answer is 5.
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1 solution
taking x common from the first 3 expressions,1 is a root of this, neglect 380 for some time.Then find the other root of the cubic eqn.Then plot a graph for the eqn stretching 380 and then find the roots.