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When y=9, the value of y² - 1 is
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When y=9, the value of y² - 1 is

User Gunas
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1 Answer

4 votes
Answer: 80:

Plug 9 into y.
y^2 - 1
(9)^2 - 1
81 - 1
80
User Adel Elkhodary
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