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Math Help - normal curve

  1. #1
    Junior Member
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    normal curve

    The normal to the curve represented by the equation y=x^2+6x+4 at the point (-2,-4) also intersects the curve at x=

    A) -6
    B) -9/2
    C) -7/2
    D) -3
    E)-1/2
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  2. #2
    MHF Contributor Mathstud28's Avatar
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    Ok

    Quote Originally Posted by andrewsx View Post
    The normal to the curve represented by the equation y=x^2+6x+4 at the point (-2,-4) also intersects the curve at x=

    A) -6
    B) -9/2
    C) -7/2
    D) -3
    E)-1/2
    Just use the equation of the normal line y-x_0=\frac{-1}{f'(x_0)}\bigg(x-x_0\bigg)
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