Solve using the Square Root Property (x+7)^2=21

Math
(x+7)2=21
Take the square root of each side of the equation to set up the solution for x
(x+7)2⋅12=±21
Remove the perfect root factor x+7 under the radical to solve for x.
x+7=±21
The complete solution is the result of both the positive and negative portions of the solution.
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First, use the positive value of the ± to find the first solution.
x+7=21
Subtract 7 from both sides of the equation.
x=21-7
Next, use the negative value of the ± to find the second solution.
x+7=-21
Subtract 7 from both sides of the equation.
x=-21-7
The complete solution is the result of both the positive and negative portions of the solution.
x=21-7,-21-7
x=21-7,-21-7
The result can be shown in multiple forms.
Exact Form:
x=21-7,-21-7
Decimal Form:
x=-2.41742430…,-11.58257569…
Solve using the Square Root Property (x+7)^2=21

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