Multiple Choice Questions on A x 1 2 122 B y2 2y ndash 143 0 ........ for SBI(PO) Exam Preparation

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Multiple Choice Questions

A x 1 2 122 B y2 2y ndash 143 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) (x + 1)2 = 122

    B) y2 + 2y – 143 = 0

    X > Y

    Incorrect Answer

    X ≥ Y

    Incorrect Answer

    X < Y

    Incorrect Answer

    X ≤ Y

    Incorrect Answer

    X = Y or No relation can be establish

    Correct Answer
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    Explanation:

    A) (x + 1)2 = 122

    ⇒ (x + 1)2 – 122 = 0

    ⇒ (x + 1 – 12)(x + 1 + 12) = 0
    ⇒ (x – 11)(x + 13) = 0
    x = 11, –13
    B) y2 + 2y – 143 = 0
    ⇒ y2 + 13y – 11y – 143 = 0
    ⇒ y(y + 13) – 11(y + 13) = 0
    ⇒ (y + 13)(y – 11) = 0
    y = 11, – 13
    So, no relation can be established.

    By: Munesh Kumari
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