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Question
Factorise the following.
a2 – 16p – 80
Sum
Solution
We have,
p2 – 16p – 80 = p2 – (20 – 4)p – 80
= p2 – 20p + 4p – 80
= p(p – 20) + 4(p – 20)
= (p – 20)(p + 4)
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 235]
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