nathandavenporosvuka nathandavenporosvuka
  • 11-07-2017
  • Mathematics
contestada

x(7 - x) > 8 A. 8 B.2 C. -1 D.0

Respuesta :

tamardowdinf tamardowdinf
  • 11-07-2017
=7x-x^2>8
0=7x-x^2-8
0= -x^2 + 7x -8
0=(x^2 + 8x)-(x - 8)
0=x(x + 8)-1(x +8)
0=(x-1)   0=(x+8)
x=1          x= -8






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