What is the Vector Equation of Planes?

[icystrike]

Homework Statement

I'm at (iii) of the question.

Homework Equations

The Attempt at a Solution

I've got the different ans.
$$\[<br /> Aug=<br /> \left( {\begin{array}{cccc}<br /> 2 & -1 & 1 & 5 \\<br /> 3 & 1 & -5 & 6 \\<br /> \end{array} } \right)<br /> \]$$

$$\[<br /> rref=<br /> \left( {\begin{array}{cccc}<br /> 1 & 0 & \frac{4}{5} & \frac{11}{5} \\<br /> 0 & 1 & \frac{-13}{5} & \frac{-3}{5} \\<br /> \end{array}} \right)<br /> \]$$

 

[LCKurtz]

Hint: The cross product of the normals is in the direction of the line of intersection. (Why?)

 

[icystrike]

Hint: The cross product of the normals is in the direction of the line of intersection. (Why?)

i'm at part 3 . Thanks by the way. I've got my doubts cleared. (=