Math, asked by sowhardyamandal, 9 months ago

please solve
l am mark as brainlist
please solve

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Answered by JONE45AVENGERS

0

( 7a-9)³-(5a-9)³-6a(7a-9)(5a - 9)

7a³- 9³- 5a³- 9³- 42a- 54a * 5a - 9

(7a³ - 5a³) - (9³- 9³) - (42a - 54a*5a) -9

2a³ - 0³ - 128 - 9

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Answered by isra3452

0

Answer:

plz mark me as brailiest

Step-by-step explanation:

( 7a-9)³-(5a-9)³-6a(7a-9)(5a - 9)

7a³- 9³- 5a³- 9³- 42a- 54a * 5a - 9

(7a³ - 5a³) - (9³- 9³) - (42a - 54a*5a) -9

2a³ - 0³ - 128 - 9

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