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Question
Use suitable identity to find the following product:
(x + 4) (x + 10)
Solution
By using the identity (x + a)(x + b) = x2 + (a + b)x + ab,
(x + 4)(x + 10) = x2 + (4 + 10)x + 4 × 10
= x2 + 14x + 40
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