(x+15)2=x+21

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Solution for (x+15)2=x+21 equation: 



(x+15)2=x+21

We move all terms to the left:

(x+15)2-(x+21)=0

We multiply parentheses

2x-(x+21)+30=0

We get rid of parentheses

2x-x-21+30=0

We add all the numbers together, and all the variables

x+9=0

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

x=-9

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