11. Evaluate: x²-2x divided by y²+2y if x = 3 y = -1

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11. Evaluate: x²-2x divided by y²+2y if x = 3 y = -1

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Ngọc Khuê 3 years 2021-08-26T04:16:24+00:00 1 Answers 14 views 0

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  1. taiduc
    0
    2021-08-26T04:17:39+00:00
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    9514 1404 393

    Answer:

      -3

    Step-by-step explanation:

    Put the values where the variables are and do the arithmetic.

      \dfrac{3^2-2\cdot3}{(-1)^2+2(-1)}=\dfrac{9-6}{1-2}=\dfrac{3}{-1}=\boxed{-3}

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )