<PRE><B>Question 157185</B>
can you show me how to solve f(x)= x^2 +4 
If I can see the example to find domain...I think I can explain to my son. I understand what domain is just not how to set up the problem and work it.
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Set f(x) = 0
x^2+4 = 0
x^2 = -4
x = +2i
x = -2i

i = sqrt(-1)
*[invoke solve_quadratic_equation 1,0,4]
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