Quadratic equations

In the quadratic formula, if b²-4ac>0, then the quadratic equation has

• two imaginary solutions
• two different real solutions
• two equal real solutions
• none of these

Tags

CCSS.HSA-REI.B.4B

In the quadratic formula, the expression
b²-4ac is called

• discrim
• determinant
• discriminant
• none of these

Tags

CCSS.HSA-REI.B.4B

The solutions of the quadratic equation
x²-5x+6=0 are

• x=1 or x=-6
• x=3 or x=2
• x=-3 or x= 2
• x=-1 or x=6

Tags

CCSS.HSA-REI.B.4B

To complete the perfect square trinomial in the expression x²-22x+_____, we need to add

• 11
• 44
• 121
• 144

Tags

CCSS.HSA-REI.B.4B

The solution of the quadratic equation
4x²-5x-9=0 are

• x=-1 or x=9/4
• x=1 or x=9/4
• x=2 or x=3
• x=-2 or x=-3

Tags

CCSS.HSA-REI.B.4B

Fill the blank space to complete the perfect square trinomial
x²-18x+____=(x- ____)²

• 9 and 3 respectively
• 81 and 9 respectively
• -9 and -3 respectively
• -81 and -9 respectively

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² - 2x - 15 = 0

• x = 5

  x = -3

• x = -5

  x = 3

• x = -15

  x = 1

• x = 15

  x = -1

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² - 14x + 24 = 0

• x = 12

  x = 2

• x = 4

  x = 6

• x = 3

  x = 8

• x = 1

  x = 24

Tags

CCSS.HSA-REI.B.4B

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4
• -4 & 10
• -8 & 4
• 8 & -4

Tags

CCSS.HSA-REI.B.4B