9a-11=21+a2

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Solution for 9a-11=21+a2 equation: 



9a-11=21+a2

We move all terms to the left:

9a-11-(21+a2)=0

We add all the numbers together, and all the variables

-(+a^2+21)+9a-11=0

We get rid of parentheses

-a^2+9a-21-11=0

We add all the numbers together, and all the variables

-1a^2+9a-32=0

a = -1; b = 9; c = -32;
Δ = b2-4ac
Δ = 92-4·(-1)·(-32)
Δ = -47
Delta is less than zero, so there is no solution for the equation

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