# Practice Test Over Quadratic Equations

#1 Solve: x2 – 3x = 10

#2 Solve: x2 + 81 = 0

#3 Solve by completing the square : x2 – 10x + 18 = 0

#4 Solve using the quadratic formula : x2 – 2x + 6 = 0

#5 Solve: 6x2 + 7x – 3 = 0

#6Solve: 3x2+ 24 = – 6x

#7 Solve: (3x – 1)2 – 5(3x – 1) – 14 = 0

#8 Solve:

#9 Graph. Label all intercepts . y = –2x2 – 8x – 6

#10 Solve the inequality : –2x2 – 8x < 6

SOLUTIONS

#1 Solve:

#2 Solve:

#3 Solve by completing the square:

#4 Solve using the quadratic formula:

#5 Solve:

#6 Solve:

#7 Solve:

#8 Solve:

#9 Graph. Label all intercepts. y = –2x2 – 8x – 6

 To find the x- value of the vertex : To find the y-value of the vertex: To find the x-intercepts:

Vertex (h, k): (–2,2)
y-intercept (0,C): (0, –6)
x-intercepts: (–1,0),( –3,0)

#10 Solve the inequality:

The quadratic is < zero where the above graph is be low the x -axis:

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