Final answer:
The estimated result of the given expression 6 × 2 - √() would be slightly less than 12, but the question appears to be missing details, specifically the value under the square root.
Step-by-step explanation:
The expression provided in the question seems to be incomplete, but it appears to resemble a calculation involving multiplication, subtraction, and finding a square root. The expression 6 × 2 - √() is missing the value inside the square root, which prevents us from calculating an exact number. However, if the question intended for the square root part to be ignored, the estimate is simply the result of 6 multiplied by 2, which gives 12; subtracting an unknown non-negative square root would make the result slightly less than 12. Therefore, without the square root value, the best estimate is slightly less than 12.
Unfortunately, the accompanying references do not provide enough context to identify what should be inside the square root, making it difficult to provide an exact answer.