Solve for a 81=a^2

Problem

81=a2

Solution

1. Identify the equation as a quadratic equation in the form a2=k where k is a constant.

2. Apply the square root property by taking the square root of both sides of the equation.

3. Include both roots because the square of both a positive and a negative number results in a positive value.

a=±√(,81)

4. Simplify the square root of 81 which is 9

a=±9

Final Answer

a=±9

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