Determinants
Your child will wield the tool that decides whether a system of equations solves uniquely. Determinants share the ten-mark algebra block with matrices, often a property-based simplification plus an area or inverse question. Learners expand determinants up to order three, simplify with row and column properties, read minors, cofactors and the adjoint, link determinants with triangular area, derive matrix inverses through the adjoint, and solve consistent systems while stressing exactly when a unique solution is guaranteed. Three misconceptions cost marks. Students expand along a row with wrong
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