00:01
So here the given equations are 7x plus 2y, 7x plus 2y equal to 5, and the next equation is 13x plus 14y, 13x plus 14y equal to minus 1.
00:18
And we are asked to find the solutions using a matrix.
00:21
Now, i'm just writing the matrix over here.
00:25
So the coefficient of x is 7, coefficient of y is 2, coefficient of x is 13, coefficient of y is 2, coefficient of x.
00:32
14 this will be the matrix a into matrix we will be x y we have only two variables over here and this is equal to 5 minus 1 this is the matrix that we have over here now first thing we would have to do is we have to make the terms 0 so for that so the formula used over here is if we have a matrix like a x equal to b, then the value of x will be equal to a inverse of b.
01:13
So from this x means x comma y and a inverse means or a means, this is the matrix x.
01:24
A means the coefficient of the given equations that is 7 to 13 14 and b means the right side of that equations that is 5 comma minus 1...