SOLUTION: can you please sole a(a+2)=8

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Question 532891: can you please sole a(a+2)=8
Answer by boilpoil(127) About Me  (Show Source):
You can put this solution on YOUR website!
a(a+2)=8
a%5E2+2a=8
a%5E2%2B2a%2B1%5E2=8%2B1%5E2 ---Completing the square.
a%5E2%2B2a%2B1%5E2=8%2B1
%28a%2B1%29%5E2=9
sqrt%28%28a%2B1%29%5E2%29=sqrt%289%29
a+1=+3/-3 (was not able to enter +- symbol)

a=-4 OR a=2