Solve for a
a=\sqrt{5}-1\approx 1.236067977
a=-\left(\sqrt{5}+1\right)\approx -3.236067977
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a+1=\sqrt{5} a+1=-\sqrt{5}
Take the square root of both sides of the equation.
a+1-1=\sqrt{5}-1 a+1-1=-\sqrt{5}-1
Subtract 1 from both sides of the equation.
a=\sqrt{5}-1 a=-\sqrt{5}-1
Subtracting 1 from itself leaves 0.
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