Solve the following using completing the square x²+18x+81

To solve the quadratic expression \(x^2 + 18x + 81\) using the method of completing the square, follow these steps:

1. **Identify the quadratic and linear coefficients**:  
   The quadratic term is \(x^2\) and the linear term is \(18x\).

2. **Half the coefficient of \(x\)**:  
   The coefficient of \(x\) is 18. Half of this value is \( \frac{18}{2} = 9 \).

3. **Square the result from step 2**:  
   \(9

Learn how to solve the quadratic expression x² + 18x + 81 using completing the square method with a step-by-step solution. This problem covers algebraic concepts, including completing the square and the quadratic formula theorem. Suitable for students in Grades 9-12.

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