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02-06-2016
Mathematics

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Which of the following are the factors of 4b2 - 16?
a. (2b + 4)(2b + 4)
b. (2b – 2)(2b + 4)
c. 4(b – 2)(b + 2)
d. 2(b – 4)(b + 4)

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02-06-2016

difference of 2 perfect squares
a^2-b^2=(a+b)(a-b)
(2b)^2-4^2=(2b-4)(2b+4)
(2b-4)=2(b-2)
(2b+4)=2(b+2)
2(b-2)2(b+2)
4(b-2)(b+2)

C is answer

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