Evaluate the expression:

x² - 3y + 12 if x = -2 and y = 5

To evaluate the expression \( x^2 - 3y + 12 \) when \( x = -2 \) and \( y = 5 \), follow these steps:

1. Substitute \( x = -2 \) and \( y = 5 \) into the expression:
   \[
   (-2)^2 - 3(5) + 12
   \]

2. Calculate \( (-2)^2 \):
   \[
   (-2) \times (-2) = 4
   \]

3. Multiply \( 3 \times 5 \):
   \[
   3 \times 5 = 15
   \]

4. Substitute these values into the expression:
   \[
   4 - 15 + 12
   \]

5. Simplify

Learn how to evaluate the expression x² - 3y + 12 with x = -2 and y = 5. Follow a step-by-step solution involving substitution and calculation of terms. This problem covers algebraic expressions and is suitable for students in Grades 7-9.

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