factorise 27m^3-729n^3
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Answer:
27m^3-729n^3
=27X{m^3-27n^3}
=27X {m^3-(3n)^3}
=27X{(m-3n)(m^2+mX3n+(3n)^2)}
=3X3X3X(m-3n)(m^2+3mn+9n^2)
Step-by-step explanation:
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