Solve using the Square Root Property n^2+20n+91=0

Math
n2+20n+91=0
Factor n2+20n+91 using the AC method.
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Consider the form x2+bx+c. Find a pair of integers whose product is c and whose sum is b. In this case, whose product is 91 and whose sum is 20.
7,13
Write the factored form using these integers.
(n+7)(n+13)=0
(n+7)(n+13)=0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.
n+7=0
n+13=0
Set the first factor equal to 0 and solve.
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Set the first factor equal to 0.
n+7=0
Subtract 7 from both sides of the equation.
n=-7
n=-7
Set the next factor equal to 0 and solve.
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Set the next factor equal to 0.
n+13=0
Subtract 13 from both sides of the equation.
n=-13
n=-13
The final solution is all the values that make (n+7)(n+13)=0 true.
n=-7,-13
Solve using the Square Root Property n^2+20n+91=0

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