vertext and parobola

  • Find the vertex of the parabola

    y = f(x)= x^2 + 8 x - 9


    x coordinate = y coordinate =  
    Graph this function and estimate the x intercepts to the nearest tenth. Give your answers in order. 
    x intercept one = x intercept two = 
in Algebra 2 Answers by Level 1 User (280 points)

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1 Answer

y=x^2+8x-9

dy/dx=slope=2x+8

slope=0 at 2x=-8 or x=-4

y at x=-4...(-4)^2=16...y=16+8*(-4) -9...16 -32-9...-25

"Vertex"...(-4,-25)

From quadratik equashun, yu kan get y=0 at x=1.109772229 & x=-8.109772229
by

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