2a^2 - a - 1 not anything to "solve" here unless we might be setting this to = 0
If so......we have
2a^2 - a - 1 = 0
(2a + 1) ( a - 1) = 0
2a + 1 = 0 or a - 1 = 0
2a = -1 a = 1
a = -1/2
Hey there, Guest!
You didn't specify what you wanted to be solved, so I'll take that you wanted me to factor this out.
(2a+1)(a−1)
Hope this helped! :)
( ゚д゚)つ Bye