1. Solve the quadratic by taking square roots. 3×2 – 7 = 140

Question

1. Solve the quadratic by taking square roots.
3×2 – 7 = 140

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Kiệt Gia 4 years 2021-08-21T21:30:44+00:00 1 Answers 29 views 0

Answers ( )

  1. quangkhai
    0
    2021-08-21T21:32:37+00:00
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    Answer:

    x=-7, \\x=7

    Step-by-step explanation:

    Given 3x^2-7=140, our goal is to isolate x.

    Start by adding 7 to both sides:

    3x^2=147

    Divide both sides by 3:

    x^2=49

    Take the square root of both sides:

    x=\pm \sqrt{49}=\pm 7

    Recall that 7^2=(-7)^2=49.

    Thus, we have:

    x=-7, \\x=7

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