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## Homework Statement

Asymptotes at y=±[itex]\sqrt{10}[/itex] x /5

Foci: (±[itex]\sqrt{7}[/itex],0)

## Homework Equations

## The Attempt at a Solution

It's obviously a hyperbola. What I can't wrap my head around is why a^2 + b^2 ≠ c^2

c = sqrt 7 ; correct?

This yields

7=25+10

obviously NOT true. What am I missing here?

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