Solve the equation by the Quadratic Formula. x^2+3=9x

Question

Solve the equation by the Quadratic Formula. x^2+3=9x

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Caroline 1 month 2021-09-09T12:46:20+00:00 2 Answers 0

Answers ( )

    0
    2021-09-09T12:47:38+00:00

    Step-by-step explanation:

    the 9x from the equation can be shifted into the equation and therefore x² + 3 = 9x can be also written as

    x² – 9x + 3 = 0

    then using the quadratic formula

    x =  \frac{ - b  \frac{ + }{ - }  \sqrt{b {}^{2} - 4ac } }{2a}

    a = 1

    b = -9

    c = 3

    substitute the values into the equation ,

    insert it in your scientific calculator and you will have the answer of

    x = 8.65 or x = 0.35

    0
    2021-09-09T12:48:05+00:00

    Answer:

    Step-by-step explanation:

    Rearrange the given x^2+3=9x in standard quadratic form:

    1x^2 – 9x +3 = 0

    Then the three coefficients are a = 1, b = -9 and c = 3.

    The discriminant is √(b^2 – 4ac), or √(81 – [1][3]), or √78.

                                            ± √78

    Thus, the roots are x = —————-

                                                   2

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45:7+7-4:2-5:5*4+35:2 =? ( )