Need help with these 3 questions.

Question

Complete the following questions by graphing

Answer 1

x^2 -16= 0

x = + or - 4

graph is an upward opening parabola with vertex = minimum point = (0,-16)

x intercepts x=4, and x=-4

y intercept = -16

axis of symmetry is x=0 or the y axis

3x^2 + 6 = 0

x^2 = -2

x = + or - isqr2

graph is an upward opening parabola with no x intercepts and y intercept = 6

axis of symmetry is x=0, vertex = minimum point = (0,6)

x^2-25 =-25

x^2 = 0

upward opening parabola with vertex = minimum point = the origin = (0,0)

only one x intercept, x=0, y intercept = 0 or (0,0) = the origin. axis of symmetry is x=0 or y axis