1.

Simplify 2√45 -5√20+ √80​

Answer»

Answer:

0

Step-by-step EXPLANATION:

√45 = 3√5

2√45 = 2 ( 3√5 )

2√45 = 6√5

√20 = 2√5

5√20 = 5 ( 2√5 )

5√20 = 10√5

√80 = 4√5

2√45 - 5√20 + √80

= 6√5 - 10√5 + 4√5

= 6√5 + 4√5 - 10√5

= 10√5 - 10√5

= 0



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