Math, asked by sonuthakurjaiho, 4 months ago

factorise 21³+432 m³

Answers

Answered by sylveon789

4

Step-by-step explanation:

a³+b³=(a+b)(a²+b²-ab)

21³+432m³

=2[ l³+216m³]

=2[(l)³+(6m)³]

=2[(l+6m){(l)²+(6m)²-(l)×(6m)}]

=2(l+6m)(l²+36²-6lm)

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