body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Theory

Square of a square root

The square root of and raised to the power of 2 are each other's opposites. Therefore, the operations cancel each other out. (sqrt()9)^2=9

Exercises

Recommended exercises

To get personalized recommended exercises, please login first.

Return to lesson.