What number must be added to the expression below to complete the square? x^2 -x

a. 1/4
b. 1/2
c. -1/4
d. - 1/2

Option A

Step-by-step explanation:

Given

We know that the formula is:

The middle term is:

x which should be equal to 2ab. So,

So we know now that we will add (1/2)^2 = 1/4 in the given expression to complete the square as the last term is square in the formula.

The expression will become:

Option A is correct ..

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

step-by-step explanation:

im not sure what the answer is