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23 February, 09:49

Find the x-intercept of parabola with vertex (1,-17) and y-intercept (0,16) ?

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  1. 23 February, 10:18
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    Y=a (x-1) ^2 - 17 is the equation of the parabola.

    at (0,16), 16=a (0-1) ^2 - 17. Solve for a = 33.

    Equation is then y=33 (x-1) ^2-17 so when y=0,

    (x-1) ^2 = 17/33

    x-1 = + and - square root of 17/33

    x = 1.7177 and 0,2823 as the intercepts
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