Question

if root 80 = k root 5 then what is k​

Answer 1

Answer:

√80=k√5

squaring on both the sides..

[√80]^2=k^2×[√5]^2

80/5=k^2

k^2=16

square root on both the sides

√k^2=√{+-4}^2

k =+-4

Answer 2

Answer:

The value of k is 4

Step-by-step explanation:

• The other number that, when multiplied by itself a predetermined number of times, equals x is the root of the number x. For instance, 3 is the second root of the number 9, as 3x3 equals 9. The square root is the common name for the second root.
• For finding the value of $\sqrt{80}$  we have to find its prime factorization.
• $80 = 2*2*2*2*5\\80 = 16*5\\\sqrt{80} = 4\sqrt{5}$
• Hence the value of k is 4.
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