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    steffimalcampo91's Avatar
    steffimalcampo91 Posts: 21, Reputation: 1
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    #1

    Jun 22, 2007, 09:41 PM
    determining equations of quadratic functions
    Find the vertex, the y-intercept and the x-intercept(s).

    1. y= -3x^2-3x
    2. y= 2x^2-6x+3
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jun 23, 2007, 04:33 AM
    The vertex can be found by using

    For the y-intercept, set x=0

    For the x-intercept, set y=0 and solve the quadratic by factoring, quadratic formula, completing the square, whatever.
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