Two mark example problem IV — task. Mathematics State Board, Class 10.

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Show that the straight lines

$x - 2y + 3 = 0$ and

$6x + 3y + 8 = 0$ are perpendicular.

Answer:

Slope of

$x - 2y + 3 = 0$ is

$\frac{i}{i}$ .

Slope of

$6x + 3y + 8 = 0$ is .

Since

$m_1 \times m_2$ , then the given lines are .

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