please give me the procedure of the previous answer also SWEETY2

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please give me the procedure of the previous answer also SWEETY2

WHERE ARE U EXPERTS ? ANSWER PLEASE!!!!

u sure about the question?

is the question correct?

yes its correct !!

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3x³ - 1 x 3

=3x³-3=3(x³-1)=3(x³-1³) and now simplify by the formulae a³-b³

=3x³-3=3(x³-1)=3(x³-1³) and now simplify by the formulae a³-b³