Question

Factorise the following:-20(a - 3b)² - 15(a - 3b)³ + 25(a - 3b)​

Answer 1

Answer:

20(a²-6ab+9b²)-15(a³-9a²b+27ab²-27b³)+25a-75b

20a²-120ab+180b²-15a³+135a²b-405ab²+405b³+ 25a-3b

20a²+180b²-15a³+405b³-120ab+135a²b-405ab²+25a-3b

Step-by-step explanation:

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