First, factor the equation.
The equation factors to...
(x+1)(x-1)(x^2+4) = 0
Set each term to 0.
x + 1 = 0
x = -1
x - 1 = 0
x = 1
x^2 + 4 = 0
x^2 = -4
Square root...
x = ±[tex]\sqrt{4}[/tex]
x = 2i, -2i.
The 4 roots in the equation are -1, 1, 2i, and -2i.
⭐ Answered by Hyperrspace (Ace) ⭐
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