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26 September, 20:33

2^x+3^2y=11

2^x+1-3^y=1

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Answers (1)
  1. 26 September, 21:02
    0
    x = 1, y = 1

    Step-by-step explanation:

    Let A = 2^x

    Let B = 3^y

    A + B² = 11

    A = 11 - B²

    2A - B = 1

    22 - 2B² - B = 1

    2B² + B - 21 = 0

    2B² + 7B - 6B - 21 = 0

    B (2B + 7) - 3 (2B + 7) = 0

    (2B + 7) (B - 3) = 0

    B = - 7/2, B = 3

    A = 11 - 3²

    A = 2

    2 = 2^x

    x = 1

    3^y = 3

    y = 1
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