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Solve for x (complex solution)
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Solve for b (complex solution)
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\left(2x+4\right)^{2}=1-8
Subtracting 8 from itself leaves 0.
\left(2x+4\right)^{2}=-7
Subtract 8 from 1.
2x+4=\sqrt{7}i 2x+4=-\sqrt{7}i
Take the square root of both sides of the equation.
2x+4-4=\sqrt{7}i-4 2x+4-4=-\sqrt{7}i-4
Subtract 4 from both sides of the equation.
2x=\sqrt{7}i-4 2x=-\sqrt{7}i-4
Subtracting 4 from itself leaves 0.
2x=-4+\sqrt{7}i
Subtract 4 from i\sqrt{7}.
2x=-\sqrt{7}i-4
Subtract 4 from -i\sqrt{7}.
\frac{2x}{2}=\frac{-4+\sqrt{7}i}{2} \frac{2x}{2}=\frac{-\sqrt{7}i-4}{2}
Divide both sides by 2.
x=\frac{-4+\sqrt{7}i}{2} x=\frac{-\sqrt{7}i-4}{2}
Dividing by 2 undoes the multiplication by 2.
x=\frac{\sqrt{7}i}{2}-2
Divide i\sqrt{7}-4 by 2.
x=-\frac{\sqrt{7}i}{2}-2
Divide -i\sqrt{7}-4 by 2.
x=\frac{\sqrt{7}i}{2}-2 x=-\frac{\sqrt{7}i}{2}-2
The equation is now solved.