SOLUTION: a^2 – a – 20 factor completly

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Question 363079: a^2 – a – 20
factor completly
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

a^2 – a – 20 

factoring completely

*Note format for factoring will be 

(a - ?)(a + ?)

(a -5)(a+4)  this format works as -5a + 4a = -a (the middle term in the original trinomial)