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Evaluate the expression for x = –9 and y = –2.

xy − y =

1 answer

To evaluate the expression \( xy - y \) for \( x = -9 \) and \( y = -2 \), we can follow these steps:

  1. Substitute the values of \( x \) and \( y \) into the expression:

    \[ xy - y = (-9)(-2) - (-2) \]

  2. Calculate \( (-9)(-2) \):

    \[ (-9)(-2) = 18 \]

  3. Now substitute this back into the expression:

    \[ 18 - (-2) \]

  4. Simplify \( 18 - (-2) \):

    \[ 18 + 2 = 20 \]

Thus, the evaluated expression is:

\[ \boxed{20} \]