Question

If x=3-2✓2, find the value of x3+x-3

Answer 1

Answer:

x=3-2root2

then x3+x-3=

(3-2root2(3))+3-2root2-3

(+3 , -3 gets cancled)

(3-2root2(3))-2root2

solve the bracket

9-6root2-2root2

9-4root2

hence 9-4root2 is the answer