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the equation x^2 + xy + y^2 = 7 has two x intercepts, find the equations of the tangent lines to the curve at those intercepts.
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so, I'll find y' first? then what?
show it, please
What are 2 intercepts?
knock knock!! are you there?
I got, for the two tangent lines, y=-2(x+sqrt(7)) ...and y=-2(x - sqrt(7))
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