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4.6 Cramer’s Rule

4.6 Cramer’s Rule. 1. System of 2 Equations. 2. System of 3 Equations. 3. Practice Problems. Cramer’s Rule. Remember how much fun it was to solve systems of equations by: Substitution? Elimination? Cramer’s Rule is a third method. Systems of 2 Equations. 2 Equation Example.

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4.6 Cramer’s Rule

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  1. 4.6 Cramer’s Rule 1 System of 2 Equations 2 System of 3 Equations 3 Practice Problems

  2. Cramer’s Rule • Remember how much fun it was to solve systems of equations by: • Substitution? • Elimination? • Cramer’s Rule is a third method

  3. Systems of 2 Equations

  4. 2 Equation Example Use Cramer’s Rule to solve the system of equations Cramer’s Rule: so…

  5. 2 Equation example (Cont.) Evaluate each determinant Simplify Solution Set: (4, -1)

  6. Systems of 3 Equations

  7. 3 Equation Example

  8. 3 Equation Example (Cont.)

  9. Practice Problems • Page 192 Problems 4-9, 12-19, 26-29

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