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smart_worker
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Homework Statement
Points A and B are 10 km apart and it is determined from the sound of an explosion heard at those points at different times that the location of the explosion is 6 km closer to A than B. Show that the location of the explosion is restricted to a particular curve and find an equation of it.
Homework Equations
√((x − 5)2 + y2) - √((x + 5)2 + y2) = 6
The Attempt at a Solution
i must simplify this to get x2/9 - y2/16 = 1
it is a hyperbola i guess
i applied (a-b)^2 = a^2 -2ab +b^2
if i square both sides i am still getting square root because 2ab is twice the product of 1st and 2nd roots which is again a root
if i square both sides again i still get a root
if i bring one root to the other side and square both sides still i am getting a root
how do i cancel the roots
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