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Q.

The value of $b^{2} - 4 a c,$ when $a = 3,$ $b = - 6$ and $c = 2$ is

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a

36

b

60

c

12

d

24

answer is B.

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Detailed Solution

$a = 3,$ $b = - 6$ and $c = 2$

$b^{2} + a c = {(- b)}^{2} - 4 (3) (2)$

$= 36 - 27$

$= 12$

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