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Question
Factorise the following:
(a + 8)2 – (b + 5)2
Sum
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Solution
Given (a + 8)2 – (b + 5)2
We know that,
(a + b) (a – b) = a2 – b2
Hence,
⇒ (a + 8 + b + 5) (a + 8 – b – 5)
⇒ (a + b + 13) (a – b + 3)
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