3. Factorise 64x³- y³ ? a) ( 4X-y ) (16x²- y²- 4xy) B) (4x+y) (16x² - y² +4xy) c) (4x-y) (16x²+y² +4xy) d) (4x+y)(16x² +y²-4xy)
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C)
a^-b^3=(a+b)(a2+b2+ab)
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