15 questions
Find the zeros for the quadratic equation.
±72
±12
12
No real solution
Find the roots for the quadratic equation.
±1.5
1.5
±1
No real solution
Solve the quadratic equation and round each solution to 2 decimal places.
x2 + 7x + 3 = 0
x = -0.46
x = -6.54
x = -0.46
x = -2.54
x = -0.06
x = -6.54
x = -0.06
x = -2.54
Find the roots for the following equation.
± 1
± 4/3
± 3/4
No real solution
Select the solutions to the equation:
x2 - 7x + 5 = 0
x = 0.8
x = - 7.2
x = 6.2
x = 5
Solve the following equation by completing the square:
n2 - 2n - 3 = 0
x = 3 and-1
x = 4 and -4
x = 5 and -3
x = 8 and -7
Write the equation y= x2-2x-5 in vertex form.
y= (x-1)2-6
y= -(x-1)2-6
y= (x+1)2-6
y= -(x+6)2-1
A parabola has a vertex at (1,6) and passes through (3,-18). Solve for "a" and use it to write the equation for the parabola in vertex form.
f(x) = 3(x - 1)2 - 18
f(x) = -6(x - 1)2 + 6
f(x) = 6(x - 3)2 - 18
f(x) = -3(x + 1)2 - 6
Write the equation in standard form:
y = -3(x + 5)2 - 4
y = 9x2 - 15x + 21
y = -3x2 - 75x - 4
y = 9x2 + 90x + 221
y = -3x2 - 30x - 79
Which graph matches the given equation?
A soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t2 + 90t gives the height h of the ball after t seconds. How many seconds will it take the ball to hit the ground?
126.56 sec
5.625 sec
2.81 sec
0 sec
Find the y-intercept of
f(x) = 2(x - 0.5)2 + 0.5
2
-2
1
-1