Question

Simplify : √45-3√20+4√5​

Answer 1

Answer:

√5

Step-by-step explanation:

The value of each will be solved below

• √45=√(9×5)=√9×√5=3√5
• 3√20=3[√(4×5)]=3[√4×√5]=6√5
• 4√5=4√5

the solution is 3√5-6√5+4√5=√5.

Therefore the answer is√5.

Answer 2

Answer:

= √45 - 3√20 + 4√5

=  3√5 -3*2√5 +4√5  

= 3√5-6√5+4√5

=  (3-6+4)√5  

= (-3+4)√5

Answer= √5

(Some are common so that's why it has been removed )

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