What number must be added to the expression below to complete the
square?
x^2 - 11x

Always add half of the "b" value squared

ax² + bx + c

Step-by-step explanation:

x² - 11x + 5.5² = (x - 5.5)²

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb