Licks, H. E · New York, D. Van Nostrand company · leaf 94
ANALYTIC GEOMETRY 85 30 = o be the given equation. In Fig. 42 the full line represents the equation y = x3 and the broken line the equation y = 20 * - 30, the horizontal scale being twenty times the vertical scale. Here there are three real roots Xi = +1.8, X2 = +3.3, x3 = -5.1. … The cubic equation y3 + Ay2 + Bx + C = 0 can be re- duced to the form x3 + x2 + bx + c by putting y = A^x and then dividing by A. Here the curve whose equation is y = x3 + x2 can be plotted by the help of tables of cubes and squares, then the points where the straight line y = —ax — b intersects…
Mathematical recreations
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
