Vertex Form of a Quadratic Equation (5.2)

What is the vertex of y=-3x²-12x-13

• (-2,-1)

• (2,-1)

• (-2,1)

• (2,1)

Tags

CCSS.HSA.REI.B.4

What is the axis of symmetry of y=-3x²-12x-13

• x=-2

• y=-2

• y=-1

• x=-1

What is the domain of y=-3x²-12x-13

• (-∞, ∞)

• (-∞, -1)

• (-∞, -2) U (-2, ∞)

• (-2, ∞)

What is the range of y=-3x²-12x-13

• (-∞, ∞)

• (-∞, -1]

• (-∞, -2] U [-2, ∞)

• [-2, ∞)

What is the y-intercept of y=-3x²-12x-13

• -13

• -12

• -13/3

• There is no y-intercept

What are the x-intercept of y=-3x²-12x-13 (to the nearest 10th)

• -13

• -12

• -13/3

• There are no x-intercept

Solve by graphing y=x²+9x+20

• {-5, -4}

• {5, 4}

• {4, 5}

• No solution

Solve for x: 74=x²-7

• x=9, -9

• 9

• x=±√67

• No real solution

What can be the first steps in completing the square of the equation x² -20x+25=6

• Move all the constants to the right side of the equation, then calculate (b/2)² which will be added to both sides.

• Move all the constants to the right side of the equation, then guess until you find the correct number.

• Move all the constants to the right side of the equation, then factor out x from the left side.

• Graph the equation and hope for the best.

Solve for x by completing the square: x²-20x+25=6

• x=1 or 19

• x=19

• x=1

• No real solution