SOLUTION: How to factorise: a^2-4b^2+a-2b I know the answer, but please help me with a step by step solution!

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Question 1067826: How to factorise: a^2-4b^2+a-2b
I know the answer, but please help me with a step by step solution!
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
a%5E2%2Ba-4b%5E2-2b
a%28a%2B1%29-2b%282b%2B1%29
not helping.

Another way
%28a-2b%29%28a%2B2b%29%2Ba-2b
%28a-2b%29%28a%2B2b%29%2B%28a-2b%29
highlight%28%28a-2b%29%28a%2B2b%2B1%29%29