Answer :

Given: Lines are:

To Show: Lines are coplanar

Proof:

Firstly, we find

Here,

So,

Now, we know that

The given are coplanar if and only if is perpendicular to

i.e.

Here,

Now, we have to find

We know that, in dot product

= -10 +10

= 0

∴ Given lines are co planar

∴ Equation of plane is

and

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