SOLUTION: (x+7)^2=81

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 7 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.

RELATED QUESTIONS
Find all the numbers for which the rational expression is undefined. 7/x^2+81 (7 over... (answered by Nate)

x^2-81=0 (answered by stanbon)

(x-6)^2=81 (answered by edjones)

81 x^2 -... (answered by MathLover1)