Find the value of $t$ , if the product of roots of the equation is $8$ .
$18 x^{2} + 9 x - t = 0$

144

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- 144

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72

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- 72

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Solution

The correct option is A $- 144$
In the quadratic equation $a x^{2} + b x + c = 0$ ,
product of roots $= \frac{c}{a}$

So, in the equation $18 x^{2} + 9 x - t = 0$ ,
product of roots $= \frac{- t}{18}$
$∴ 8 = \frac{- t}{18}$
$∴ t = - 144$

Answer is option (B)

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