Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so. You know that kid in the front of the class?

[MindYourDecisions] presents a Babylonian tablet dating back to around 1800 BC that shows that the hypotenuse of a unit square is the square root of two or 1.41421. How did they know that?

Mathematicians once turned up their noses at imaginary numbers. But complex analysis actually simplifies math and physics.

The square root of 2025 is 45. The divisors of 45 (apart from 45 itself) are 1, 3, 5, 9 and 15. The product of these numbers ...

\({9}\) is a square number. \(3 \times 3 = 9\) \(3 \times 3\) can also be written as \(3^2\). This is pronounced "\({3}\) squared". \({8}\) is a cube number. The ...

However, there are inherent differences between the two. While standard deviation measures the square root of the variance, the variance is the average of each point from the mean. Standard ...

Some quadratics cannot be factorised. An alternative method to solve a quadratic equation is to complete the square. To solve an equation of the form \(x^2 + bx + c = 0\) consider the expression ...