Question 663690
Solve:

X^4 + 100 = 0
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{{{x^4 = -100}}}
Use DeMoivre's Theorem
x^4 = 100cis(180) + n*360
x = sqrt(10)cis(45) + n*90
x = sqrt(10)cis(45), ...cis(135), cis(225), cis(315)
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Probably more than Algebra 2 can do, tho.
--> not an appropriate problem for Algebra 2.