19. The complete factorisation - 12b ^ 3 - b ^ 3 + b is a) - b * (12b ^ 4 + b ^ 2 - 1) (b) b(2b - 1)(2b + 1)(1 + 3b ^ 2) (c) - b * (4b ^ 2 - 1)(3b ^ 2 + 1) (d) b(1 - 2b)(1 + 2b)(1 + 3b ^ 2) This is the question and answer is d (book answer) Don't Google because there is c and someone has ans. d but no explaination, don't spam If explain right, you get brainlest. Answer point - 50
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Verified answer
Step-by-step explanation:
-12b³-b³+b
-b(12b²+b²-1)
middle term break..
-b(12b²+4b²-3b²-1)
-b( 4b²(3b+1)-1(3b²+1))
-b(4b²-1)(3b²+1) = OPTION C
if we write this in expand form we will get this:
-b(2b-1)(2b+1)(3b²+1)
which is not in option, if we see option D, where there is no negative sign before b so option D goes incorrect. So final answer is Option C
Answer:
refer in the attachment