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Question
Factorise the following:
2a2 + 9a + 10
Solution
Product = 2 × 10 = 20, sum = 9
Split the middle term as 5a and 4a
2a2 + 9a + 10 = 2a2 + 5a + 4a + 10
= a(2a + 5) + 2(2a + 5)
= (2a+ 5)(a+ 2)
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