Question

9. If (x - 1)3 = 8, what is the value of (x + 1)2​

Answer 1

(x – 1)3 = 8

x – 1 = 2

x=3

(x + 1)2 = (3 + 1)2

=4^2=16

Answer 2

Answer:

(x-1)=8/3

x=(8/3)+1

x=(8+3)/3

x=11/3

then,

(x+1)2

={(11/3)+1}2

={(11+3)/3}×2

=(14×2)/3

=28/3