Question

explain the answer
I am giving you the correct answer
is 90
explain
​

Answer 1

x=under root 18

so x²=18

x4=256

x5=256 root18

x5=768 root 2

and x³=18 root 18

so x³=54 root 2

the required answer will be

768root 2+256

54root2

Answer 2

Answer:

Step-by-step explanation:

[x^5 +x^4]/x^3 =x^2   + x

                        = 18 +√18

                       = 18 + 3√2