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Q.

What should be subtracted from $f (x) = 6 x^{3} + 11 x^{2} - 39 x - 65$ so that $f (x)$ is exactly divisible by $x^{2} + x - 1 ?$

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a

$- 38 x - 60$

b

$9 x + 10$

c

$38 x + 60$

d

$- 19 x - 30$

answer is B.

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Detailed Solution

Question Image

Reminder is $- 38 x - 60$

$∴ - 38 x - 60$ has to subtract.

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