how would you solve this problem? I don’t know how to find the 2nd term, but I already found the first and 3rd term. (7-3x)^2

Question

how would you solve this problem? I don’t know how to find the 2nd term, but I already found the first and 3rd term. (7-3x)^2

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Tryphena 3 years 2021-08-17T07:44:28+00:00 2 Answers 4 views 0

Answers ( )

  1. minhkhue
    0
    2021-08-17T07:45:32+00:00
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    Answer:

    Step-by-step explanation:

    FOIL ?  know it?  first, outside , inside , last

    (7-3x)(7-3x)

    49 -21x -21x + 9x^{2}

    49 – 42x + 9x^{2}

    write it in descending order ( of x )

    9x^{2} -42x + 49

  2. Euphemia
    0
    2021-08-17T07:45:59+00:00
    Reply

    Answer:

    7-3=4×2=8 maybe i dont know

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