The teacher will be very surprised to see your correct solution 😉
__________________ / 3 / ___ \/ 18 - \/ x + 10 = 4
3 ____ x1 = 2*\/ 18
x1 = 2*18^(1/3)
sum
3 ____ 2*\/ 18
=
product
2*18^(1/3)
x1 = 5.24148278841779