Im working on a part off my course and it covers this, but its not clear.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\phi[/tex]= half (1+[tex]\sqrt{5}[/tex])

[tex]\varphi[/tex]=half (1-[tex]\sqrt{5}[/tex])

The question asks [tex]\phi[/tex]-[tex]\varphi[/tex] =[tex]\sqrt{5}[/tex]

It is writen in my book, the answer but it does not explain how the maths cancels and manipilates.

Could you show me a way that the answer is derived.

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# Homework Help: Golden ratio

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