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Question
factorise: (3x - 2y)2 - 5(3x - 2y) - 24
Sum
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Solution
(3x - 2y)2 - 5(3x - 2y) - 24
= (3x - 2y)2 - 8(3x - 2y) + 3(3x - 2y) - 24
= (3x - 2y) (3x - 2y - 8) + 3 (3x - 2y - 8)
= (3x - 2y - 8)(3x - 2y + 3)
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Factorisation by Grouping
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