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Question
Use the direct method to evaluate the following products :
(8 – b) (3 + b)
Sum
Solution
(8 – b) (3 + b) = (8 × 3) + (8 × b) + (−b × 3) + (−b × b)
= 24 + 8b − 3b − b2
= 24 + 5b − b2
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