Tn=n2+2n+9

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Solution for Tn=n2+2n+9 equation: 



T=T2+2T+9

We move all terms to the left:

T-(T2+2T+9)=0

We add all the numbers together, and all the variables

-(+T^2+2T+9)+T=0

We get rid of parentheses

-T^2-2T+T-9=0

We add all the numbers together, and all the variables

-1T^2-1T-9=0

a = -1; b = -1; c = -9;
Δ = b2-4ac
Δ = -12-4·(-1)·(-9)
Δ = -35
Delta is less than zero, so there is no solution for the equation

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