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Question
Find the value of:
(20 + 30 + 40) (40 – 30 – 20)
Sum
Solution
(20 + 30 + 40) (40 – 30 – 20) = (1 + 1 + 1)(1 – 1 – 1) ......[∵ a0 = 1]
= (3)(–1)
= –3
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