How can I solve the equation a^2 = 4?

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To solve the equation a² = 4, we will take the following steps:

  1. Understand the Equation: The equation states that a squared is equal to 4. We need to find the values of a that satisfy this equation.
  2. Isolate the Variable: To find a, we can take the square root of both sides of the equation. Remember that taking the square root can yield both positive and negative values. Thus, we rewrite the equation:
  3. Calculate the Square Roots:
    • √(a²) = ±√4
    • Therefore, a = ±2.
  4. Conclusion: The solutions to the equation a² = 4 are a = 2 and a = -2.

In summary, the two possible values for a that solve the equation are 2 and -2.

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