rpasie199 rpasie199
  • 19-06-2017
  • Mathematics
contestada

How many real solutions does the equation have?

-x^2+9x-7

Respuesta :

ghanami
ghanami ghanami
  • 20-06-2017
hello :
-x^2+9x-7 =0
delta = b²-4ac =9²-4(-1)(-7) =  81-28 = 53>0
two reals  solutions
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