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