Question

If x is equal to 3 minus under root 8 find the value of x cube + 1 upon x cube

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

If x = 3-√8

Then 1/x =3+√8

When we will add x+1/x = 3-√8 +3+√8

                                          = 3+3 =6

now cubing both side

x+1/x³=6³

so 6×6×6 =216

now final ans is 216