Answer:
C
Explanation:
You're probably stuck by this problem. Let's rewrite the problem.
-2√45 + 3√3 + 2√3
The first part of simplifying the expression is to simply the radicals. Since 45 has a factor which is a square, let's simplify.
-2√45 = -2√5 × 9 = (-2 × 3)√5 = -6√5
Let's just continue simplifying and dissect the 3√3 + 2√3.
3√3 + 2√3 = 5√3...
The answer is...
5√3 - 6√5 or -6√5 + 5√3, C