Difference between revisions of ".Mzcw.NzIxNg"
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| − | Then xy = 100. And | + | Then xy = 180. And y = 180/x. |
| + | But x;y::5:4. And 5y = 4x. Or y = 4x/5. | ||
| + | Th. 180/x = 4x/5 | ||
| + | Mult. [[formula]] | ||
| + | Div. by [[formula]] | ||
| + | Extr. [[formula]] | ||
| + | Ergo y = 100/x =12 | ||
| + | |||
| + | XIII. Of Quadratic Equation. | ||
| + | 91. The equation xx = 225 of the last problem | ||
| + | is as has been observ'd §32; a quadratic equation | ||
| + | but it is only what algebrists call a simple | ||
| + | [[underline]] quadratic equation, [[/underline]] to distinguish it from | ||
| + | others, where the unknown quantity is found | ||
| + | both of two & of one demension, as in the | ||
| + | equation xx + ax = bb: And equations of this | ||
Latest revision as of 19:22, 12 August 2018
(29) Then xy = 180. And y = 180/x. But x;y::5:4. And 5y = 4x. Or y = 4x/5. Th. 180/x = 4x/5 Mult. formula Div. by formula Extr. formula Ergo y = 100/x =12
XIII. Of Quadratic Equation. 91. The equation xx = 225 of the last problem is as has been observ'd §32; a quadratic equation but it is only what algebrists call a simple underline quadratic equation, /underline to distinguish it from others, where the unknown quantity is found both of two & of one demension, as in the equation xx + ax = bb: And equations of this
