22. If (x - 1)3 = 8, then find the value of (x + 1)2.
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Answer: 28/3
Step-by-step explanation:
( x-1)3 =8
3x - 3 =8 (distributive property)
3x = 8 + 3
3x = 11
x = 11/3
(x + 1)2
by substitution
(11/3 + 1)2
(2 * 11/3)+(2 * 1) (distributive property)
22/3 + 2
22/3 + 6/3
28/3
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