factorise :-
4a^2-32ab+64b^2
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Question -
4a² - 32ab + 64b
Answer ==>
4a² - 16ab - 16ab + 64b²
4a(a-4b) - 16b ( a - 4b)
(4a - 16b) ( a - 4b)
4a - 16b = 0
4a = 16b
a = 16b/4
a = 4b
and
a - 4b = 0
a = 4b
Hence,
a = 4b is the factor.
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