factorise: 16a²-88ab+121b²-25c²
please help me it's urgent.
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Answer:
It can be written as
(4a)^2- 2(4a)(11b) +(11b)^2 - (5c)^2
{(4a-11b)^2}-(5c)^2
=(4a-11b+5c)(4a-11b-5c) Ans
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