Okay, so section 12-1 involved drawing little lines and connecting them. That's about it for that section. So, since that can't get me 150 words, I will just review matrices again. You can add, subtract, or multiply matrices but you can't divide them.
Adding Matrices:
[4 5] + [-9 2] = [-5 7]
[7 8] [5 -3] [12 5]
Subtracting Matrices:
[7 18] - [5 4] = [2 12]
[9 4] [-8 2] [17 2]
Multiplying Matrices:
[2 5] X [3 10] = [11 30]
[7 6] [1 2] [27 82]
That's only some of the things on matrices. You also have scalar multiplication, Cramer's rule, and finding the inverse and determinant of a matrix.
Cramer's rule is:
Dx/d
Dy/d
Scalar multiplication is when you solve without using Cramer's rule.
The determinant of a matrix is ad-bc.
The inverse of a matrix is 1/ the determinant of the matrix.
That's all I got on matrices. Next time I will probably review something different.
No comments:
Post a Comment