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3 February, 15:10

Match the parabolas represented by the equations with their foci. Tiles y = - x2 + 4x + 8 y = 2x2 + 16x + 18 y = - 2x2 + 5x + 14 y = - x2 + 17x + 7 y = 2x2 + 11x + 5 y = - 2x2 + 6x + 5 Pairs Focus Equation of Parabola (-2.75, - 10) arrowBoth (2, 11.75) arrowBoth (-4, - 13.875) arrowBoth (1.25, 17) arrowBoth

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  1. 3 February, 16:29
    0
    Given:

    y = - x2 + 4x + 8

    y = 2x2 + 16x + 18

    y = - 2x2 + 5x + 14

    y = - x2 + 17x + 7

    y = 2x2 + 11x + 5

    y = - 2x2 + 6x + 5

    Standard formula : y = ax ² + bx + c; - (b/2a) is the x-coordinate of the vertex. Substitute the value of x to find the value of y.
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