X(x+3)=X2+9

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Solution for X(x+3)=X2+9 equation: 



X(X+3)=X2+9

We move all terms to the left:

X(X+3)-(X2+9)=0

We add all the numbers together, and all the variables

-(+X^2+9)+X(X+3)=0

We multiply parentheses

-(+X^2+9)+X^2+3X=0

We get rid of parentheses

-X^2+X^2+3X-9=0

We add all the numbers together, and all the variables

3X-9=0

We move all terms containing X to the left, all other terms to the right

3X=9

X=9/3

X=3

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