Quadratic Equation Review

The part under the radical(b²-4ac) in the quadratic equation is called the __________________.

Tags

CCSS.HSA-REI.B.4B

The discriminant tells you how many __________ there are.

Tags

CCSS.HSA-REI.B.4B

Identify the a, b, and c in this quadratic expression

4x² - 10x + 3

• a = 3, b = -10, c = 4

• a = 3, b = 4, c = -10

• a = -10, b = 3, c = 4

• a = 4, b = -10, c = 3

Identify the a, b, and c in this quadratic expression

7 + 13x - 19x²

• a = 7, b = 13, c = -19

• a = 13, b = 7, c = -19

• a = -19, b = 13, c = 7

• a = 7, b = -19, c = 13

For the expression 3x² + 2x - 1, the value of the discriminant is ________________.

Tags

CCSS.HSA-REI.B.4B

For the expression 5x² + 10x - 2, the value of the discriminant is ________________.

Tags

CCSS.HSA-REI.B.4B

For the expression x² + 6x + 9, the value of the discriminant is ________________.

Tags

CCSS.HSA-REI.B.4B

For the expression 8x² - 5x + 3, the value of the discriminant is ________________.

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula.
 $x^2-2x-4=0$  

•  $2\pm\sqrt{20}$  

•  $1\pm\sqrt{10}$  

•  $1\pm\sqrt{5}$  

•  $4\pm\sqrt{2}$  

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula.

  $x^2-6x+1=0$  

•  $3\pm2\sqrt{2}$  

•  $6\pm\sqrt{32}$  

•  $6\pm4\sqrt{2}$  

•  $2\pm8\sqrt{2}$  

Tags

CCSS.HSA-REI.B.4B