What are the solutions to the equation y2 – 1 = 80?

–5 and 5

–4 and 4

–7 and 7

–9 and 9

for this question you should first add +1 on both sides of the equation so you will have:
y^2 = 80 + 1
y^2 = 81
so the square root of 81 is 9 and -9 so y equals to 9 and -9 :)))
i hope this is helpful
have a nice day

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TSO TSO · Answer 2 · 2016-03-21T13:18:20-04:00

TSO TSO

21-03-2016

\(y^2 - 1 = 80\\\\y ^2 = 81\\\\y =\sqrt{81}\\\\ y = \pm 9\\\\ y=9\\y = -9\)

Your final answer is -9 and 9.

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What are the solutions to the equation y2 – 1 = 80?–5 and 5–4 and 4–7 and 7–9 and 9

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What are the solutions to the equation y2 – 1 = 80?

–5 and 5

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