Work out squaring a number instantly with clear inputs, formula shown and shareable results.
Squaring multiplies a number by itself. The difference of two squares factorises as a² − b² = (a − b)(a + b), which is why consecutive squares differ by the sum of the two numbers.
Square
x² = x × x
Difference of squares
a² − b² = (a − b)(a + b)
289 and 324, differing by 35 = 17 + 18.
Not for a real number. Squares of real numbers are always zero or positive.