4(x + 7)^2 – 49 = -13 solve the following quadratic equation for all values of x in the simplest form

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4(x + 7)^2 – 49 = -13 solve the following quadratic equation for all values of x in the simplest form

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Hưng Khoa 1 year 2021-09-02T14:14:59+00:00 1 Answers 0 views 0

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  1. thuthuy
    0
    2021-09-02T14:16:11+00:00
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    Answer:

    4(x²+14x+49)-49+13=0

    4x²+56x+196-49+13=0

    4x²+56x+160=0

    D=3136-2560=576

    x1=-56+24/8=-4

    x2=-56-24/16=-10

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