Final answer:
To simplify the given expression, evaluate the square roots first and then perform multiplication and addition. The correct answer is A) 5 + √5 + √42.
Step-by-step explanation:
To simplify the given expression √5×5+ 5/2+ √42, we can first evaluate the square roots.
The square root of 5 is √5 and the square root of 42 is √42. The expression becomes √5 × 5 + 5/2 + √42.
Next, we can simplify the multiplication and addition. √5 × 5 is equal to 5√5.
Finally, we can add the remaining terms. The simplified expression is 5√5 + 5/2 + √42.
Therefore, the correct answer is A) 5 + √5 + √42.