Respuestas

2013-10-01T06:10:57+02:00
Formula
x = (-b +- \sqrt (b ^{2}  - 4ac))/ 2a

solucion
(x - 5)^2 = 144
x^2 -10x + 25 = 144
x^2 - 10x + 25 - 144 = 0
x^2 - 10x - 119 = 0
a = 1     b = -10    c = -119

x = (-b +- \sqrt (b ^{2}  - 4ac))/ 2a
x = (-(-10) +-  \sqrt ((-10) ^{2}  - 4(1)(-119))) / 2(1)
x = (10 +-  \sqrt (100 + 476) ) / 2
x = (10 +- 24) / 2
 x_{1} = (10 + 24) / 2 = 34/2 =17
 x_{2} = (10 - 24) / 2 = -14 / 2 = -7