3. If A, B, C and C are constants, show that: (a) the lines: Ax + By + C = 0 Ax + By + C = 0 are parallel (b) the lines:
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3. If A, B, C and C are constants, show that: (a) the lines: Ax + By + C = 0 Ax + By + C = 0 are parallel (b) the lines:
3. If A, B, C and C are constants, show that: (a) the lines: Ax + By + C = 0 Ax + By + C = 0 are parallel (b) the lines: Ax + By + C = 0 Bx - Ay + C = 0 are parallel
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