Square Root Quadratic

What do you do to the "b" value to correctly complete the square?

• square it

• divide it by 2 and square the result

• multiply it by 2 and take the square root of the result

• divide it by 2 only

Tags

CCSS.HSA-REI.B.4B

Rory is in the process of solving a quadratic by completing the square. The step she left off on is below.

x² - 16x + 64 = 20 + 64

what goes in the blank for Rory's next step?

(x - __ )² = 84

• 2

• 4

• 8

• 20

Tags

CCSS.HSA-REI.B.4B

Which equation below should you get if you correctly complete the square?

• (x+3)² = 22

• (x+9)² = 22

• (x+3)² = 13

• (x+3)² = 9

Tags

CCSS.HSA-REI.B.4B

What is one of the solutions to this equation? (x - 1)² = 49 Hint: Step 1 is to square root both sides.

• -12

• -7

• 50

• 8

Tags

CCSS.HSA-REI.B.4B

Solve the equation using square roots.
x² = 121

• 60.5

• ± 11

• ± 12

• 11

Tags

CCSS.8.EE.A.2

2x²= 30

• x= √5

• x= √30

• x= √15

• x= ±5

Tags

CCSS.8.EE.A.2

x²=25

• x = 5

• x = -5

• x = ±25

• x = ±5

Tags

CCSS.8.EE.A.2

Solve using square roots.

k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no real solution

Tags

CCSS.8.EE.A.2

x²−10=19

• x = √29

• x = ±2√9

• x = ±29

• x = ±5√19

Tags

CCSS.8.EE.A.2

Solve using square roots.
4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

Tags

CCSS.8.EE.A.2