Question

4√5 + 5√5 is equal to:
1. 9√5
2. 9√10
3. 5√10
4. 7√5

Answer 1

Answer:

option 1. 9√5

Step-by-step explanation:

4√5 + 5√5

= √5 × ( 4+5 )

= √5 × 9

= 9√5

Answer 2

Answer:

4

$4 \sqrt{5} + 5 \sqrt{5} = \sqrt{5} \times (4 + 5) = 9 \sqrt{5}$

9 root 5 is your answer