f(5/6)=-9

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Solution for f(5/6)=-9 equation: 



f(5/6)=-9

We move all terms to the left:

f(5/6)-(-9)=0

We add all the numbers together, and all the variables

f(+5/6)-(-9)=0

We add all the numbers together, and all the variables

f(+5/6)+9=0

We multiply parentheses

5f^2+9=0

a = 5; b = 0; c = +9;
Δ = b2-4ac
Δ = 02-4·5·9
Δ = -180
Delta is less than zero, so there is no solution for the equation

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