6 public-domain matches
Negative Numbers
On Certain Properties of Square Numbers and Other Quadratic Forms, with a Table of Odd Numbers from 1 to 191, Divided into 4, 3 or 2 Square Numbers, the Algebraic Sum of Whose Roots (Positive or Negative) May Equal 1, by means of Which Table All the Odd Numbers up to 9503 May be Resolved into not Exceeding 4 Square Numbers

Des quantités positives et negatives en géométrie

A treatise on the geometrical representation of the square roots of negative quantities

The teaching of elementary algebra
