(3x-1)^2=75

2 min read Jun 16, 2024
(3x-1)^2=75

Solving the Equation: (3x - 1)^2 = 75

This article will guide you through the steps to solve the equation (3x - 1)^2 = 75. We'll use algebraic methods to find the possible values of 'x'.

Understanding the Equation

The equation (3x - 1)^2 = 75 represents a quadratic equation. This means it involves a variable ('x') raised to the power of 2. To solve for 'x', we need to isolate it.

Solving for 'x'

  1. Take the square root of both sides: √(3x - 1)^2 = ±√75 3x - 1 = ±√75

  2. Simplify the square root: 3x - 1 = ±5√3

  3. Isolate 'x': 3x = 1 ± 5√3

  4. Divide both sides by 3: x = (1 ± 5√3) / 3

Solutions

Therefore, the equation (3x - 1)^2 = 75 has two solutions:

  • x = (1 + 5√3) / 3
  • x = (1 - 5√3) / 3

Verification

You can verify these solutions by substituting them back into the original equation:

  • For x = (1 + 5√3) / 3: (3 * [(1 + 5√3) / 3] - 1)^2 = (1 + 5√3 - 1)^2 = (5√3)^2 = 75

  • For x = (1 - 5√3) / 3: (3 * [(1 - 5√3) / 3] - 1)^2 = (1 - 5√3 - 1)^2 = (-5√3)^2 = 75

Both solutions satisfy the original equation, confirming their validity.

Conclusion

By applying algebraic techniques, we have successfully solved the equation (3x - 1)^2 = 75, finding two distinct solutions for 'x'. It's essential to remember that quadratic equations often have multiple solutions, and verifying them is crucial to ensure their accuracy.

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