True or False? #4

Algebra Level 5

Which of these followings are true?

A. The graph of \(xy=0\) is a union of the \(x\)-axis and the \(y\)-axis.

B. If the graph of \(x^2+y^2=r\) appears on the Cartesian coordinates system, then \(r>0.\)

C. The graph of \(|y|=\sqrt{-2x^2+3xy}\) and \( x = c \) intersects at two points for all real values \(c\neq 0 \).


This problem is a part of <True or False?> series.

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