00:01
Quadratic surface is given to us is by equation 6x square plus y square minus 2z square minus 4xy plus 2xz minus 4yz is equals to 21.
00:20
We have to write it in the form of v transpose a into v.
00:26
What is v? v is equals to the vector xyz and v transpose will be in the row form xyz.
00:38
Now the only term left is to calculate the a matrix.
00:42
This is equals to 21 given we have to find what is the a matrix.
00:46
So a matrix will be here is xyz.
00:52
Z.
00:53
Here will be the coefficient of x square, a is a coefficient of x, y is the coefficient of xz.
01:00
Here we got the coefficient of xy will get the coefficient of y square, coefficient of yz, coefficient of zx, coefficient of zy, coefficient of z square.
01:11
If we compare from this surface quadratic equation we got the coefficient of x square is 6, coefficient of y square is 1, coefficient of z square is negative 2.
01:24
Now it is xy this is also xy...