Question

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

Answer 1

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