Factorise : 1-343a3-21a + 147a2
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Answered by
7
Answer:
Given -: 1 - 343a³ - 21a + 147a²
=. (1)² - (7a)³ - 3(1)²(7a) + 3(1)(7a)²
by using (a+b) = a³- b³- 3a²b + 3ab²
= (1-7a)³
Step-by-step explanation:
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Answered by
18
Answer:-
Given -: 1 - 343a³ - 21a + 147a²
=. (1)² - (7a)³ - 3(1)²(7a) + 3(1)(7a)²
by using (a+b) = a³- b³- 3a²b + 3ab²
= (1-7a)³
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