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OpenStudy (anonymous):
using the quadratic formula. Let f(x)=9x2−9x−7.
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OpenStudy (anonymous):
substitute x with zero then solve I believe....
OpenStudy (anonymous):
using the quadratic formula
OpenStudy (anonymous):
ohhh
OpenStudy (anonymous):
sorry, I cant help you on that one
OpenStudy (anonymous):
quadratic formula is [x=(-b \pm \sqrt{b^2{}-4ac})/2a\]. the equation you have is in the form y=ax^2+bx+c
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