rpasie199 rpasie199

19-06-2017
Mathematics

contestada

How many real solutions does the equation have?

-x^2+9x-7

Respuesta :

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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