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GCSE Maths Practice: substitution

Question 1 of 10

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\( \text{Find the value of } 2a^2 - b \text{ when } a = 3,\ b = 5 \)

Choose one option:

\( 9 \) \( 13 \) \( 10 \) \( 11 \)

\( \text{First square } a, \text{ then multiply and subtract } b. \)

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