Final answer:
Equation 3, x = -1/2, is the one that has a solution of -1/2, which is clear from both the answer options provided and the reference equation after steps of solving for x.
Step-by-step explanation:
The question is asking which of the given equations has a solution of -1/2. The equation provided for reference, (2x)² = 4.0 (1 − x)², suggests that by taking the square root of both sides, you get 2x = ±(1 - x). To find the solution equating to -1/2, we thus need to solve the equation 2x = 1 - x. Adding x to both sides yields 3x = 1, and dividing both sides by 3 gives x = 1/3, which does not match our target solution. When considering 2x = -1 + x, we subtract x from both sides, obtaining x = -1, which again is not what we're looking for. Ultimately, it is clear from the answer choices provided that only Equation 3, x = -1/2, matches the target solution we want.