"It is simply necessary to bring all the terms of the equation to one side, so that the other side shall be equal to zero. Then taking... the function of the unknown quantity... which forms one side of the equation, for the ordinate y, the curve described by these co-ordinates x and y will give by its intersections with the axis those values of x which are the required roots of the equation."
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Lectures on Elementary Mathematics
Lectures on Elementary Mathematics (1898) is the earliest English translation of Joseph Louis Lagrange's 1795 publication, Leçons élémentaires sur les mathematiques, containing a series of lectures delivered the same year at the Ecole Normale. The work was translated and edited by Thomas J. McCormack, and a second edition, from which the following quotes are taken, appeared in 1901.
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