Week 6: The discriminant

How many solutions does this parabola have?

• 0

• 1

• 2

• 3

• Can't tell

How many solutions does this parabola have?

• 0

• 1

• 2

• 3

• Can't tell

How many solutions does this parabola have?

• 0

• 1

• 2

• 3

• Can't tell

How many solutions does this parabola have?

• 0

• 1

• 2

• 3

• Can't tell

How many solutions does this quadratic equation have

 $y\ =\ x^2-5x+2$  

• 0

• 1

• 2

• 3

• Insufficient information has been provided

How many solutions does this quadratic equation have

 $y\ =\ x^2-2x+2$  

• 0

• 1

• 2

• 3

• Insufficient information has been provided

How many solutions does this quadratic equation have

 $y\ =\ x^2-4x+4$  

• 0

• 1

• 2

• 3

• Insufficient information has been provided

How many solutions does this quadratic equation have

 $y\ =\ x^2-3x+3$  

• 0

• 1

• 2

• 3

• Insufficient information has been provided

The quadratic equation $y\ =\ x^2-6x+c$  has just one solution. What is the value of c?

• 3

• 6

• 9

• 12

The quadratic equation $y\ =\ -2x^2+bx-3$  has two solutions, what are valid values of b

• -6

• -2

• 4

• 5

• 6