how can i solve this question?

I do not understand intersection of two planes.

How can i find the normal vector?

please give me full explanation

This question illustrates the standard method to nd a direction vector for the line of intersection of two planes. 2 2 1 X: 3 +2 5 +y 0 3 2 1 3 4 4 X: 3 +A 1 +y 7 4 5 2 S a -- Hence a direction vector for the line of intersection of these planes is l I 53 I. A normal vector to the plane is:ha- Note: remember the Maple notation for a vector is . A normal vector to the plane