Question

explain in detail what is cramer's rule.​

Answer 1

In linear algebra, Cramer's rule is an explicit formula for the solution of a system of linear equations with as many equations as unknowns, valid whenever the system has a unique solution

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Answer 2

In linear algebra, Cramer's rule is an explicit formula for the solution of a system of linear equations with as many equations as unknowns, valid whenever the system has a unique solution. ... Cramer's rule can also be numerically unstable even for 2×2 systems.