It is Diophantus of Alexandria who is considered the father of algebra, though Abu Jafar Muhammad ibn Mūsā al-Khwārizmī is said by some to be worthy of a share in the title. Diophantus preceeds the latecomer by 500 years. It was the latter who published in the 9th century AD. Diophantus was around a lot earlier. Use the link to the related question and check facts there and with the links.
I have twelve children...so I use Pascal's triangle every year to help teach coefficients of polynomial expressions to my incoming algebra students. It lso has a use when teaching cellular biology... I am not sure what other use it has (except that this year my first grandchild is starting algebra, so the cycle should continue ad infinitum).
The sixth century AD covers the years from 501 AD to 600 AD.
The first century AD
We generally credit Diophantus of Alexandria as laying the groundwork for algebra in the second or third centuries AD. We can't be certain because records from that time are a challenge to find. Use the link to the related question to read a bit on the history of algebra. You'll find that link below.
It was a book written in around AD 820 by a persian mathematician called Al-Kwarizmi. It's basically about algebra.
810 AD
Wednesday the 7th July AD
810 AD
2000
Some where around 1500 ad
There is no such thing as an "ad verge" in algebra - as far as I know. Check the spelling, and if you mean "average", or perhaps something completely different ask a separate question.
1. The year Christ was crucified then ressurected.
Some where around 1500 ad
the year 1000 AD or CE
Prophet mohammad went to syria with abu-talib at the age of 12 years
Around 105 AD, in Dongha Dynasty
About year 789 AD from Denmark and Norway.