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Question
Expand (3m + 5)2
Sum
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Solution
(3m + 5)2
Comparing (3m + 5)2 with (a + b)2 we have a = 3m and b = 5
(a + b)2 = a2 + 2ab + b2
(3m + 5)2 = (3m)2 + 2(3m)(5) + 52
= 32m2 + 30m + 25
= 9m2 + 30m + 25
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