Square Roots with Negatives

x² = 121
What does x equal?

• 11²

• 11 and -11

• 20 and 11

• 12 and 1

Tags

CCSS.8.EE.A.2

• 10
• -10
• 10i

• -10i

Answer explanation

The square root of a negative number can be separated into 2 parts: the square root of a positive number times the square root of negative one, also known as i.

In this case we simplify into the square root of 100 times the square root of negative one, or 10 times i, or just 10i.

• 10
• -10
• 10i
• -10i

True or false: Any expression that includes square roots of negative numbers also results as "undefined" with no solution

• True

• False

• I don't know

• √1
• 1
• -1
• Not possible

Tags

CCSS.HSN.CN.A.1

• 3

• -3

• 3i

• -3i

Simplify.

• 
• 
• 
• 

What's the square root for this number:

• -4

• -8

• 8/-8

• None of the above