What number must be added to the polynomial to complete the square? use the slash mark ( / ) as a fraction bar if necessary. x2 + x

X does not equal one but there is 1x in the problem so  it is 1.
So.. to complete the square you always take 1/2 of that number.

so half of 1 is 1/2.
Then you square that number 1/2 * 1/2 = 1/4

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