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Question
Factorise the following by grouping the terms:
15x2 + 7y - 3x - 35xy
Sum
Solution
15x2 + 7y - 3x - 35xy
= 15x2 - 3x - 35xy + 7y
= (15x2 - 3x) - (35xy - 7y)
= 3x(5x - 1) - 7y(5x - 1)
= (5x - 1)(3x - 7y)
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Factorisation by Grouping
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