When do I use X = A⁻¹B in Matrices & Determinants, and what does it mean?
solution of the linear system AX = B.
X = A⁻¹B — solution of the linear system AX = B. Use it when: A is invertible (det A ≠ 0). Always check the condition holds before plugging in numbers.
Key point
X = A⁻¹B
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