# SOLUTION: solve the following equation for x (x+4)^2=81

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 Click here to see ALL problems on Quadratic Equations Question 104634: solve the following equation for x (x+4)^2=81Answer by jim_thompson5910(28696)   (Show Source): You can put this solution on YOUR website! Start with the given equation Take the square root of both sides Simplify the square root (note: If you need help with simplifying the square root, check out this solver) Subtract 4 from both sides to isolate x. Break down the expression into two parts:  or  Now combine like terms for each expression:  or  ----------------------------------- Answer: So our solution is  or  Notice when we graph the equations and we get: graph of (red) and (green) Here we can see that the two equations intersect at x values of and , so this verifies our answer.