00:01
Here i want to solve the following system of equations using kramer's rule.
00:05
So kramer's rule tells us that x equals the determinant of the matrix c1, c2, b1, b2, over the determinant of the matrix a1, a2, b2, and y is going to have the same matrix in the denominator, but in the numerator, we have the matrix a1, a2, c1, c2.
00:31
So let's plug in what we have.
00:32
So we're going to plug in the coefficients of my x's for a, the coefficients of y for b, and the coefficients or my constants for c.
00:44
So that gives us three, four, two, negative four over one, three, two, negative four.
00:54
And then i still have 1 -3 -2 -9 -4 in the denominator for y, and in the numerator i'll have 1 -3 -3 -4...