First slide

Equation of line in Straight lines

Question

The locus represented by the equation $(x - y + c)^{2} + (x + y - c)^{2} = 0$ is

Moderate

A

a line parallel to $x$ -axis
B

a point
C

a pair of straight lines
D

a line parallel of $y$ -axis

Solution

From the given equation we have
$x - y + c = 0$ and $x + y - c = 0$ which represents
the point (0, $c$ .)

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