# How do you solve #(x-9)^2=12#?

##### 2 Answers

#### Explanation:

You could expand the left side, move everything to the left, and apply the quadratic formula; however, taking the root of both sides is far faster:

Recall that

You would have the same result even with applying the quadratic formula -- this method is just faster and cleaner.

Mar 30, 2018

#### Explanation:

Solve:

Take the square root of both sides.

Prime factorize

Apply rule:

Add

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