To estimate the value of \( 6 \times 2 - \sqrt{} \), it seems there might be a typo because there should be a number or expression after the square root symbol (\( \sqrt{} \)).
Assuming you meant \( 6 \times 2 - \sqrt{4} \):
- Calculate \( 6 \times 2 = 12 \)
- Calculate \( \sqrt{4} = 2 \)
- Now subtract: \( 12 - 2 = 10 \)
If instead you meant \( 6 \times 2 - \sqrt{n} \) where \( n \) is some positive number, please provide the value of \( n \) for an accurate estimate.
Based on what's provided, none of the choices (9.8, 8.4, 6.4, 7.1) appear to be very relevant as they are all less than 10. Please clarify the problem for a more precise estimation.