Finding Solutions for Quadratics

Find the roots/zeros of x² + 4x - 21

• -7, 3

• -3, 7

How many roots does this parabola have? 

• 3

• 2

• 0

• 1

The equation y = x²  is graphed.  Based on this graph, what are the roots of the equation x²  = 0?

• 0

• -1 and 1

• 2 and 0

• y

The discriminant is

• aX² + bX + c

• b - 4ac

• b² - 4ac

• b² + 4ac

How many x-intercepts does it have?

• 0

• 1

• 2

• 4

What is the equation to the graph?

• y=(x-5)(x-4)

• y=(x+5)(x+4)

• y=x²-20x-9

• y=(x-5)²

Solve
4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

What are the solutions to
v² + 6v + 5 = 0

• (1,0) and (0,0)

• (5, 0) and (-7, 0)

• (-5, 0) and (-1, 0)

• (6,0) and (0,0)

Factor x² + x - 2

• (x + 1)(x - 2)

• (x - 1)(x + 2)

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2