Answers

  • Brainly User
2015-09-04T22:55:37+08:00
Re-write:
a² (a-b) + 2a (b-a)
a² (a-b) - 2a (a -b)

FACTOR by grouping:
(a² - 2a) (a-b)
a (a-2) (a-b) 
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