Solve x^2-8x=3 by completing the square. which is the solution set of the equation

For this case we have the following expression:

We must complete squares.

So:

We divide the middle term between two and we square it:

, then:

We have to, by definition:

Then, rewriting:

(

To find the roots, we apply square root on both sides:

We have two solutions:

(

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