- 0, -2
- 0, 1
- None of these
- 2, 0
- 0, 3

Option 1 : 0, -2

Free

RBI Grade B 2020: Full Mock Test

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200 Questions
200 Marks
120 Mins

**Calculation:**

Let assume that one root of x2 - x + m = 0 is a

and,

According to the question:

Root of x2 - 3x + 2m = 0 is 2a

So,

a2 - a + m = 0 ....(1)

And,

(2a)2 - 3(2a) + 2m = 0

⇒ 4a^{2} - 6a + 2m = 0 ....(2)

From equation (1) and equation (2)

a = -m ....(3)

a^{2} = -2m ....(4)

From equation (3) and (4)

m^{2} + 2m = 0

⇒ m (m + 2) = 0

∴ m = 0

∴ m = -2

The correct option is 1 i.e. 0, -2
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