brainiacfool brainiacfool
  • 13-10-2017
  • Mathematics
contestada

which equation shows the quadratic formula used correctly to solve 7x^2=9+x?

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Alexis6166
Alexis6166 Alexis6166
  • 13-10-2017
7x^2=9+x
minus 9+x both sides
7x^2-1x-9=0


for ax^2+bx+c=0
x=

7x^2-1x-9=0
a=7
b=-1
c=-9

x= is correct usage
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