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A rocket is shot into the air with an initial velocity of 800 m/sec. The equation h = -16t2 + 1440t models the height of the ball. How long does it take for the rocket to hit the ground (h=0)?
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Find the real solutions by completing the square: z^2 + 12z + 21 = 0
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Solve the equation by any method: 6x^2 + 21x - 12 = 0
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Solve x^2 + 4x – 32 = 0
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Write a quadratic equation in the form ax^2 + bx + c = 0 that has the given numbers as solutions: (5, -3)
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
What is a quadratic equation?
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Solve x^2 + 6x - 15 = -8 by completing the square.
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Solve the equation by factoring: x^2 + 9x + 20 = 0
(1/2), -4
90 seconds
x^2 - 2x - 15 = 0
An equation that has degree 2
-8, 4
-7, 1
-5, -4
-6 ± √(15)
Check it!