Which are steps in the process of completing the square used to solve the equation 3 – 4x = 5×2 – 14x? Check all that apply

Question

Which are steps in the process of completing the square used to solve the equation 3 – 4x = 5×2 – 14x? Check all that apply

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Madeline 4 months 2022-01-31T03:46:37+00:00 2 Answers 0 views 0

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  1. Madeline
    0
    2022-01-31T03:48:27+00:00
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    Answer:

    2nd 4th and 7th on edg

    Step-by-step explanation:

  2. Madeline
    0
    2022-01-31T03:48:29+00:00
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    Answer:

    B)3 = 5×2 – 10x

    D)8 = 5(x2 – 2x + 1)

    G)  = (x – 1)2

    Step-by-step explanation:

    Given quadratic : 3 – 4x = 5×2 – 14x

    We need to apply completing the square to solve the equation.

    First step is to get rid 4x from left side.

    We can add 4x on right side to get rid from left side.

    3 = 5x^2-14x+4x

    On simplifying this step, we get

    3 = 5x^2-10x

    Now, we need to factor out 5 from right side to get the coefficient of x^2 as 1.

    We get,

    3 = 5(x^2-2x)

    Now, coefficient of x is -2. So, we need to add half of the square of -2.

    -2/2 = -1.

    And square of -1 is 1.

    Therefore, adding 1 inside parenthesis and 5×1 = 5 on left side, we get

    3+5 = 5(x^2 -2x+1)

    8 = 5(x^2 -2x+1)

    Let us find the perfect square of (x^2 -2x+1).

    (x^2 -2x+1) = (x-1)^2

    Therefore, we get

    8 = 5(x-1)^2.

    So, the above highlighted are steps in the process of completing the square.

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