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OpenStudy (august899):
Prove or disprove that the circle with equation x^2-4x+y^2=-3 intersects the y-axis.
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hartnn (hartnn):
If it intersects y axis, it will have real y co-ordinates. to get y co-ordinates, plug in x =0 in the equation and solve for y
hartnn (hartnn):
any doubts? :)
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