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Question
Evaluate : (4a +3b)2 - (4a - 3b)2 + 48ab.
Solution
By using for this formula = x2 - y2 = (x + y) (x - y)
= (4a + 3b + 4a - 3b) (4a + 3b - 4a + 3b) + 48ab
= (8a) (6b) + 48ab
= 48ab + 48ab
= 96ab
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