Solving the Equation (y-1)² = 9
This equation represents a simple quadratic equation. Let's break down how to solve it step-by-step.
1. Taking the Square Root
To get rid of the square, we take the square root of both sides of the equation:
√((y-1)²) = ±√9
This gives us:
y - 1 = ±3
2. Isolating 'y'
Now, we isolate 'y' by adding 1 to both sides:
y = 1 ± 3
3. Finding the Solutions
This gives us two possible solutions:
- y = 1 + 3 = 4
- y = 1 - 3 = -2
Therefore, the solutions to the equation (y-1)² = 9 are y = 4 and y = -2.