Question 329735
This problem is in quadratic expressions and inequalities. Find all real and imaginary solutions to the equation. I am lost. Please help 

a^4 +6aČ +8 = 0
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{{{(a^2 + 4)*(a^2 + 2) = 0}}}
Can you finish it?
{{{a^2 + 4 = 0}}}
a = ± 2i
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{{{a^2 + 2 = 0}}}
a = ± i*sqrt(2)