Math, asked by tani9879, 7 months ago

If a=1 and c=2, then the coefficient of b² in (a-b)³+(b-c)³ is : *

Answers

Answered by HansDaruka

2

Answer:

(1-b)³+(b-2)³= 1-b³-3b+3b²+b³-8-6b²+12b

= -3b²+9b-7

Answer= -3

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