Alessandro wrote the quadratic equation -6=x2+4x-1 in standard form. What is the value of c in his new equation? c=-6 c=-1

Question

Alessandro wrote the quadratic equation -6=x2+4x-1 in standard form. What is the value of c in his new equation?

c=-6
c=-1
c=5
c=7

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Dâu 5 years 2021-07-17T21:24:14+00:00 2 Answers 40 views 0

Answers ( )

  1. Giakhanh
    0
    2021-07-17T21:25:21+00:00
    Reply

    Answer:

    the answer is c

    Step-by-step explanation:

  2. ThanhThu
    0
    2021-07-17T21:25:32+00:00
    Reply

    Given:

    A quadratic equation is

    -6=x^2+4x-1

    To find:

    The standard form of the given equation and find the value of c.

    Solution:

    The standard form of a quadratic equation is

    ax^2+bx+c=0               …(i)

    We have,

    -6=x^2+4x-1

    It can be rewritten as

    0=x^2+4x-1+6

    0=x^2+4x+5

    x^2+4x+5=0            …(ii)

    On comparing (i) and (ii), we get

    c=5

    Therefore, the value of c is equal to 5 and the correct option is C.

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