Question

c) √45 − 3√20 + 3√5​

Answer 1

45=9×5, 20=4 ×5.

3^2 =9

2^2=4

according to your question

3( rude 5) - 2 (rude 5) + 3 (rude 5)

= (rude 5) {3-2+3}=4 (rude 5) answer.

Answer 2

Answer:

0

Step-by-step explanation:

√45 = 3√5

3√20 = 6√5

√45 - 3√20 + 3√5

= 3√5 - 6√5 + 3√5

= 3√5 + 3√5 - 6√5

= 6√5 - 6√5

= 0