Mathematics, 10.04.2021 03:00, tdyson3p6xvtu

Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x+4x-21. If there is more than one x-intercept, separate them with commas.

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Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x+4x-21. If there is mo...