Answer :

……(1)

……(2)

a_{1} = 4, b_{1} = 4, c_{1} = – 5

a_{2} = 7, b_{2} = 1, c_{2} = 3

x_{1} = 5, y_{1} = 7, z_{1} = – 3

x_{2} = 8, y_{2} = 4, z_{2} = 5

the condition for two line to be coplanar,

= 0

=

=

= 3(12 + 5) + 3(12 + 35) + 8(4 – 28)

= 3 × 17 + 3 × 47 + 8 × (–24)

= 51 + 141 – 192

= 192 – 192

= 0

The lines are coplanar to each other .

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