GCSE Maths Practice: substitution

Question 7 of 10

This question practices substitution and simplifying expressions with squares and multiplication.

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\( \text{Evaluate } (x - y)^2 + 3z \text{ when } x = 4, y = 1, z = 2 \)

Choose one option:

Calculate each part separately: first (x - y)^2, then 3z, and finally add them together.

Compute the square first, then multiply and sum the terms, following BIDMAS.