125a^3-b^3. factorise it
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125a^3-b^3
=( 5a)^3-(b)^3
= (5a-b)(5a^2+5ab+b^2)
=(5a-b)(25a^2+5ab+b^2)
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Answered by
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Answer: (5a-b)(25a^2+5ab+b^2)
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