A number outside of the square root symbol is actually multiplied by the square root of the number under the symbol. 25 and 9 are considered perfect squares because a number multiplied by itself goes evenly into each without any remainders.
=3√25 - √9
take the square root of 25 and 9
=3(5) - 3
multiply 3*5
=15 - 3
=12
ANSWER: 12 (first choice)
Hope this helps! :)
