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4 September, 04:17

The vertex of a parabola is (-1.5, - 12.5), and its y-intercept is (0, - 8). the x-intercepts of the parabola are - 2,0 - 4,0 2,0 4,0 and - 1,0 2,0 1,0 - 2,0

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  1. 4 September, 04:57
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    Hello,

    y=k (x+3/2) ²-25/2

    and - 8=k*9/4-25/2==>9/4k=9/2==>k=9/2*4/9=2

    y=2 (x+3/2) ²-25/2

    x - intercepts:

    y=0=2 (x+3*2) ²-25/2

    ==> (x+3/2) ²=25/4

    ==>x=-3/2-5/2 or x=-3/2+5/2

    ==>x=-4 or x=1

    (-4,0) and (1,0) are x intercepts

    Answer no choice!
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