Multiple Choice Questions on The equation x2 px q 0 has roots equal to p and q where q 0 What are the values of p and q respectiv........... for CDS Exam Preparation

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Multiple Choice Questions

The equation x2 px q 0 has roots equal to p and q where q 0 What are the values of p and q respectiv...........

Quantitative Aptitude (CDS) Quadratic Equations
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    The equation x2 + px + q =0 has roots equal to p and q where q \neq 0. What are the values of p and q respectively?

    1, -2

    Correct Answer

    1,2

    Incorrect Answer

    -1,2

    Incorrect Answer

    -1,-2

    Incorrect Answer
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    Explanation:

    ATQ p and q are roots of equation  x2 + px + q =0
    => p+q= -p  and pq = q
    pq-q = 0
    (p - 1)=0 =>p=1.

    p+q= -p
    2p= -q
    q= - 2(\because p=1)
    (p,q)=(1,2)

    By: Munesh Kumari
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