Question

if (x-1)³=8, what is the value of (x+1)²?

Answer 1

(x-1)^3=8
By cube rootingbon both sides
(x-1)=2
x-1=2
x=3
(x+1)^2=(3+1)^2
=(4)^2
=16

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Answer 2

(x-1)3 = 8
By cube rooting on both sides...
(x-1) = 2
x=2+1=3

(x+1) = (3+1) = 4
(x+1)2= (4)2 = 4×4 = 16

Hence the required answer is 16...

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