Consider the following equation. x^2 - 4 x - 1 = 0 To complete the square, first rewrite the equation as x^2 - 4 x = 1. What value would then be added to both sides of the equation to complete the square? (Enter an exact number.)

Step-by-step explanation:

Hello, please find below my work.

We know that for any a and x real numbers we can write

When we compare with the left part of the equation we can identify the term in x so that -4=-2a (multiply by -1) <=>4=2a (divide by 2) <=> a = 4/2 = 2

So we can write

So we have to add 4 to both sides of the equation to complete the square and it comes:

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

just sum

10 + 10 = 20

it is not that hard all u have to do is plot the graph

step-by-step explanation: