GCSE Maths Practice: substitution

Question 3 of 10

This question practices substitution and handling multiple products with negative numbers.

\( \text{Evaluate } xy + yz + zx \text{ when } x = 2, y = -3, z = 1 \)

Choose one option:

Write each term separately before adding. Double-check the signs of each term.

Compute each multiplication carefully. Remember that multiplying a positive by a negative gives a negative number.