Solving Quadratic Equations with the Quadratic Formula

Identify a, b and c in the quadratic equation: $2x^2-3x-5=0$   

• a = 2 , b = 3, c = -5

• a = 2, b = -3, c = 5

• a = 2, b = -3, c = -5

• a = -2, b = 3, c = 5

 $b^2-4ac$  is called the . . .

• Square root

• Quadratic formula

• X-intercepts

• Discriminant 

Tags

CCSS.HSA-REI.B.4B

Solutions of a quadratic equation are also called

• roots

• x-intercepts

• zeros

• All of the above

If there are no real solutions, the discriminant is

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

If there is one solution, the discriminant is . . .

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

 $b^2-4b+4=0$  

• x = -2

• x = 2

• no real solution

• x = -2 and 2

Tags

CCSS.HSA-REI.B.4B

 $m^2-5m-14=0$  

• x = 7 and -2

• x = 7 and 2

• x = -7 and -2

• x = -7 and 2

Tags

CCSS.HSA-REI.B.4B

 $x^2+4x+3=0$  

• x = 1 and -3

• x = -1 and -3

• x = -1 and 3

• x = 1 and 3

Tags

CCSS.HSA-REI.B.4B

 $2x^2-2x+3=0$  

• x = -1 and 3

• x = 1 and -3

• No real solution

• x = 1

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve using the Quadratic Formula:

 $2x^2+7x-15=0$  

•  $x=-1.5,\ 5$  

• No Solution

•  $x=-5,\ 1.5$  

•  $x=0.7,\ 5$  

Tags

CCSS.HSA-REI.B.4B