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Solving an Equation

Find the equa...

Question

Find the equation of the line perpendicular to x-axis and passing through $(- 2, - 1)$ .

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Solution

The equation perpendicular to $x - a x i s$ is given by $x = k$
The line passes through $(- 2, - 1)$
$⟹ k = - 2$
so the required straight line is $x + 2 = 0$

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