Solve for x x^2-9=0

Problem

x2−9=0

Solution

1. Identify the equation as a quadratic equation that can be solved by isolating the variable or by factoring.

2. Add 9 to both sides of the equation to isolate the x2 term.

x2=9

3. Take the square root of both sides, remembering to include both the positive and negative roots.

x=±√(,9)

4. Simplify the square root of 9.

x=±3

Final Answer

x=±3

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