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Question
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
Solution
(2x - 5) (2x + 5) (2x- 3)
= (4x2 - 25) (2x - 3)
= 8x3 - 12x2 - 50x + 75
(Using identity : (x - a) (x + b)
= x2 - (a - b) x - ab).
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