Question

if y=3+2√2 then y^3+1/y^3=​

Answer 1

Step-by-step explanation:

given that y=3+2√2

and we y^3 + 1/y^3=( 3+2√2)^3 + 1/(3+2√2)^3

=3^3 + (2√2)^3 + 3×3×2√2(3+2√2)

= 27 + 16√2 + (54√2 + 72)

=27 + 16√2 + 54√2 + 72

=99 + 70√2. answer

Answer 2

ANSWER: 99+70root2!

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Hope it helps!