The plural of formula is formulae or formulas. Formulae contain equals signs, as do equations, so it can sometimes be difficult to tell the difference between an equation and a formula.

So is it true that only geniuses can solve this math equation? I reached out to a mathematics professor to help me run the numbers on this tricky math problem. You’ve no doubt seen this math ...

This means that, using Pythagoras’ theorem, the equation of a circle with radius r and centre (0, 0) is given by the formula \(x^2 + y^2 = r^2\). Find the equation of a circle with radius 3 ...

The Theory of Equations: with an Introduction to the Theory of Binary Algebraic Forms. By W. S. Burnside A. W. Panton Fourth edition. 2 vols. Pp. xiv + 286 and xii + 292. (Dublin: Hodges ...