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30 November, 09:04

How to factor a polynomial with four terms by grouping:

20ay - 10ax + 42by - 21bx

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Answers (1)
  1. 30 November, 11:55
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    = 10a (2y-x) + 21b (2y-x)

    = (2y-x) (10a+21b)
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