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Matrices & Determinants — ISC Class 12

Master Matrices & Determinants for ISC Class 12. Free verified step-by-step solutions, 2 past exam problems, formulas, and markschemes.

Exam Questions & Step-by-Step Markschemes (2 Problems)

Question 1 • 2024 6 Marks
Solve the following system of linear equations using matrix inversion method: \begin{aligned} x - y + 2z &= 7 \\ 3x + 4y - 5z &= -5 \\ 2x - y + 3z &= 12 \end{aligned}
Answer: x = 2, \quad y = 1, \quad z = 3
Question 2 • 2023 6 Marks
Solve using matrix method: \begin{aligned} x - y + z &= 4 \\ 2x + y - 3z &= 0 \\ x + y + z &= 2 \end{aligned}
Answer: x = 2, \quad y = -1, \quad z = 1

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