Which of the following is a quadratic polynomial whose sum of zeroes and product of zeroes are respectively 0 and √5?

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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
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  1. x2 − √5
  2. x2 + √5
  3. x2 − x + √5
  4. x2 + x + √5

Answer (Detailed Solution Below)

Option 2 : x2 + √5
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Detailed Solution

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Calculations:

Let the roots of the Equations be α, β 

Hence, According to the Question

α + β = 0 

α × β = √5 

The Quadratic Equation in the form of rooots

x2 - (α + β)x + αβ = 0

x2 - 0 + √5 = 0

x2 + √5 = 0 

Hence, The Correct option is 3.

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