Answer
$1$
Work Step by Step
With an expression that has the form $x^2 + bx$, add $(\frac{b}{2})^2$ to complete the square:
In the expression $x^2 - 2x$, $b$ is $-2$; therefore, $(\frac{b}{2})^2$ is:
$(\frac{-2}{2})^2$
Simplify the fraction:
$(-1)^2$
Evaluate the exponent:
$1$
