Multiple Choice Questions on Two numbers p and q are such that the quadratic equation px2 3x 2q 0 has 6 as the sum and product of........... for CDS Exam Preparation

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Multiple Choice Questions

Two numbers p and q are such that the quadratic equation px2 3x 2q 0 has 6 as the sum and product of...........

Quantitative Aptitude (CDS) Quadratic Equations
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    Two numbers p and q are such that the quadratic equation px2 + 3x + 2q = 0 has - 6 as the sum and product of the roots . What is the value of (p - q) ?

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    Explanation:

    Sum of roots = -(b/a) = -3/p = - 6 => p = 1/2
    Product of roots = c/a = 2q/p = -6 => q= - 6p/2 = -3/2
    \therefore p - q =1/2 - (-3/2) = 1/2+3/2 = 2

    By: Munesh Kumari
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