Question

7 root 20 - 6 root 5 please help :(

Answer 1

Answer:

8√5

Step-by-step explanation:

7√20 is the same as 7√4×5 and the square root of 4 is 2,5 is left as√5 because it doesn't have a whole number as the square root making

7√20=7√4×5

=7×2√5=14√5

back to the question,7√20-6√5.

since7√20=14√5,it becomes

14√5-6√5 .since √5 is an unknown,it is basically the same as saying 14y-6y=8y.

therefore,14√5-6√5=8√5

Answer 2

7√20-6√5=8√5

Step-by-step explanation:

7√20-6√5

=7×2√5 -6√5

=8√5