Solving Quadratic Equations Review

Solve using square roots.  x² - 4 = 0

• x = 2
• x = 2 or -2
• x = -2
• x = 16 or -16

Tags

CCSS.HSA-REI.B.4B

Solve the equation by factoring:
x² + x - 20 = 0

• x = -5 and 4
• x = 4 and 5
• x = 5 and -4
• x = -4 and -5

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square. x² - 2x = 5

• x = 1 ± √6
• x = 3 and -1
• x = -1 ± √6
• x = 1 and -3

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula. 
12x + 9x² = 5

• x = -6/18 and 30/18
• x = -5/3 and 1/3
• x = 5/3 and -1/3
• x = 6/18 and -30/18

Tags

CCSS.HSA-REI.B.4B

Determine the # of real solutions. 
x + 2 = -3x²

• One
• Two
• Zero
• Infinite

Determine the # of real solutions. 
4x² - 2x = 10

• Zero
• One
• Two
• Three

Solve using square roots.      3x² - 15 = 0

• x = -√5
• x = 5 and -5
• x = √5
• x = √5 and -√5

Tags

CCSS.HSA-REI.B.4B

Solve the equation by factoring:
x² -5x = 24

• x = ±√5
• x = -8 and 3
• x = 8 and -3
• No Real Solution

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square. 
3x² - 12x + 6 = 0

• x = 2 ± √-6
• x = 2 ± √6
• x = -2 ± √2
• x = 2± √2

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula. 
x² + 10x = -25

• x = -5
• x = ±5
• x = 5
• x = 0

Tags

CCSS.HSA-REI.B.4B