Question

En que tabla de multiplicar me da 240 y restando me da16

Answer 1

Explicación paso a paso:  

XY = 240

X - Y = 16

X = 240/Y

240/Y - Y = 16

(240 - Y^2)/Y = 16

240 - Y^2 = 16Y

Y^2 + 16Y - 240 = 0

$(-16 + \sqrt{16^2 - 4(1)(-240)} ) /2(1)$

$-16 + 8\sqrt{19} /2$

$-8 + 4\sqrt{19}$ = Y

$-8 - 4\sqrt{19}$ = Y

XY=240

X$(-8 + 4\sqrt{19})$ = 240

X$(-8 - 4\sqrt{19})$= 240