Multiple Choice Questions on A x2 ndash 7x 12 0 B y2 ndash 9y 20 0 ........ for SBI(PO) Exam Preparation

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Multiple Choice Questions

A x2 ndash 7x 12 0 B y2 ndash 9y 20 0 ........

Quantitative Aptitude (SBI-PO) Quadratic Equations
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    Direction: In the following question, two equations are given in variables X and Y. You have to solve these equations and determine the relation between X and Y.

    A) x2 – 7x + 12 = 0

    B ) y2 – 9y + 20 = 0

    X > Y

    Incorrect Answer

    X ≥ Y

    Incorrect Answer

    X < Y

    Incorrect Answer

    X ≤ Y

    Correct Answer

    X = Y or No relation can be established

    Incorrect Answer
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    Explanation:
    A) x2 – 7x + 12 = 0
    ⇒ x(x – 4) – 3(x – 4) = 0
    ⇒ (x – 4)(x – 3) = 0
    So, x = 3, 4
    B ) y2 – 9y + 20 = 0
    ⇒ y(y – 5) – 4(x – 5) = 0
    ⇒ (y – 5)(y – 4) = 0
    So, y= 4, 5
    Hence, X ≤ Y

    By: Munesh Kumari
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