39 results for “square”
A number multiplied by itself.
The value that squares to n.
Factors the difference of two perfect squares.
Expands the square of a binomial.
Rewrites a quadratic in vertex form.
Rewrite a quadratic as a perfect square plus a constant.
Total length around a square.
Space enclosed by a square.
Length of the diagonal of a square.
Average squared deviation from the mean.
Square root of the variance; typical spread.
Tests goodness of fit between observed and expected counts.
Average of squared differences between predicted and actual values.
Square root of MSE, in the same units as the target variable.
Sum of the diagonal entries of a square matrix.
The square of the orbital period is proportional to the cube of the semi-major axis.
Root-mean-square speed of gas molecules.
Aerodynamic lift produced by a wing depends on air density, speed squared, area and lift coefficient.
Accelerated stall speed rises with the square root of the load factor.
Ratio of wingspan squared to wing area; higher AR reduces induced drag.
Convert area from square meters to square feet.
Convert acres to square meters.
Convert area from square kilometers to square miles.
Convert bar to pounds per square inch.
Closed form for the sum of the first n squares.
The sum of the first n cubes equals the square of the sum.
The nth perfect square.
Runtime that grows with the square of input size.
Quick method to square any number near 50 using the identity (50±d)² = 2500 ± 100d + d².
Instantly square any number ending in 5. Multiply the tens digit by (tens digit + 1), then append 25.
Use the identity (a+b)(a-b) + b² = a² to square numbers quickly by going to the nearest easy number.
The Dwandwa (duplex) method squares any number by summing duplex values digit by digit — a general Vedic squaring technique.
Use (a+1)² = a² + 2a + 1. Square the round number below, add twice it, add 1.
The sum of the first n odd numbers is always a perfect square, exactly n².
a² − b² = (a + b)(a − b). Turns a subtraction of squares into an easy product.
Two numbers equally spaced around a middle value m multiply to m² − d², using the difference of squares.
Bracket the number between two perfect squares, then refine with a quick average step.