ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    (x + 1)2 + (y тАУ 3) 2 + (z +

    5) 2 = 0, then find the value of 2x + 3y - z.
    A 12 Correct Answer Incorrect Answer
    B -12 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer

    Solution

    If (x + 1)2 + (y тАУ 3) 2 + (z + 5) 2 = 0, then (x = -1), (y = 3), and (z = -5).

    So,
    - x + 1 = 0 тЖТ x = -1
    - y - 3 = 0 тЖТ y = 3
    - z + 5 = 0 тЖТ z = -5

    Therefore, required value:
    2(-1) + 3(3) - (-5) = -2 + 9 + 5 = 12

    Practice Next
    More Algebra Questions

    Relevant for Exams:

    ask-question