Question

√(√(20+√(20+√(20+√(20))​

Answer 1

Step-by-step explanation:

x=√20+x

x²=20+x

x²-x-20=0

now we apply middle term method.

x²-5x+4x-20=0

x(x-5)+4(x-5)=0

(x+4)(x-5)=0

x= -4 x=5.☺️

x cannot be nagative so x=5