The roots of the equation 9x^2 - bx + 81 =0 will be equal, if the value of b is

1. The roots of the equation 9x^2 - bx + 81 =0 will be equal, if the value of b is

[Officer (Cash)-2018 [MCQ] : 2018]

1. +9

2. +18

3. 27

4. 354

Answer

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