Answer:
Step-by-step explanation:
Remark
√80 = √(16 * 5) = 4√5 I will put the - sign in when I gather terms
√45 = √(9 * 5) = 3√5
Expression
4√5x - √80x+√45x
Solution
4√5x - 4√5x + 3√5x
The first two terms cancel out
3√5x is all that is left
Answer: 3√5x
