Question

y³=9+4√5
Then what is value of y?

(N.B I have found this on internet and the answer was given(3+√5)/2
Can anyone explain how is it possible?)​

Answer 1

Answer:

answer is 2.616

Step-by-step explanation:

take power to RHS

y=$\sqrt[3]{9+4\sqrt{5} }$

the solve the equation

root(5) = 2.23

multiply with 4 we get 8.92 added with 9 => 17.92

cube root of 17.92 is 2.616