What should be the value of $b$ , if the value of
$(29 x^{2} + 7 x - 10 + 6 b)$ is $18$ , when $x = 2 ?$

- 15

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- 17

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- 19

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Solution

The correct option is B $- 17$
Given $29 x^{2} + 7 x - 10 + 6 b = 18$

Substituting the value of $x$ in the above expression, we get,

$\Rightarrow 29 (2)^{2} + 7 (2) - 10 + 6 b = 18$
$\Rightarrow 116 + 14 - 10 + 6 b = 18$
$\Rightarrow 120 + 6 b = 18$
$\Rightarrow b = - 17$

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