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Factorisation by Regrouping Terms

viii Factoris...

Question

Question 3(viii)
Factorise the expressions
$10 a b + 4 a + 5 b + 2$

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Solution

$10 a b + 4 a + 5 b + 2 = 10 a b + 5 b + 4 a + 2 = 5 b (2 a + 1) + 2 (2 a + 1) = (2 a + 1) (5 b + 2)$

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