simplfy : (2a+6b)^3+(8a-9b)^3
plz answer me fast
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=8a^3+216b^3+512a^3-729b^3+36ab(2a+6b)-
216ab(8a-9b)
=520a^3-305b^3+(a^2b(72+1728))+ab^2(216-1944)
=520a^3-305b^3+1800a^2-1728ab^2
216ab(8a-9b)
=520a^3-305b^3+(a^2b(72+1728))+ab^2(216-1944)
=520a^3-305b^3+1800a^2-1728ab^2
priya166:
hi
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