((1+√5)/2)² , how to simplify?

I should simplify this: ((1+√5)/2)²

Please help and explain me, I really don't now how to do it and I need help soon frown

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1 Answer

{[sqrt(5)+1] /2}^2.....

=(1/4)*[sqrt(5)+1}^2

=(1/4)*[5+1+2sqrt(5)]

=(1/4)*[6+2sqrt(5)]

=(1/2)*[3+sqrt(5)]
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