INT Algebra2-Lennart Galdiga: Quadratic Functions

Click on the link below and you will see EXACTLY what you need to do for this blog. If he could find a image or two of the graphing of each of the equations....IT WOULD BE PERFECT!

INT Algebra2-Lennart Galdiga: Quadratic Functions: "How to identify quadratic functions: Standardform: ax² + bx + cy² + dy + e= 0 If you have an equation like 4x² + 4y²=36 The equation is a ..."

Multipying Matrices

This is as good as you can do! AWESOME!!!

Multipying Matrices: "

Scalar multiplication is when you distribute the number outside the matrix to all the numbers inside the brackets.

To multiply matrices, you first need to write a dimension statement. The dimension statement basically states that the columns of the first matrix must match the rows of the other matrix
For example:

2 x 2 2 x 2

2 x 2 times 2 x 2

The numbers highlighted show that the matrices can be multiplied, since the inside numbers are the same.

2 x 2 times 2 x 2

These numbers become the dimensions for the product matrix.

After you determined that the matrices can be multiplied, then you start to multiply them together. To do this, you would multiply the first row of the first matrix with the column of the second matrix. More specifically, you would multiply the first number of the first row on the first matrix with the first number of the first column of the second matrix. You then add the products together and thats the first number of the product matrix. You repeat this until all the numbers of both the matrices have been multiplied, giving you your product matrix.

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The Teenage Brain

Muliplying Matrices

Here Jordan Bayne explains the concept of dimension statement. I can really see he knows what is going on! Really nice!!!

Muliplying Matrices: "Before you can begin to multiply matrices you need determine whether or not the matrices can be multiplied. To do that you must write a dimension statement.

[3 4] [1 2 3]
[5 6] [4 5 6]
[7 8]
The dimension statement for this would be 3X2 times 2X3.

• The numbers on the inside (in red) must be the same to carryout the multiplication process
• The numbers on the outside (in blue) tell what the dimension of the solution will be. In this particular problem, the solution will be a 3 X 3 matrix.

If the two matrices can be multiplied, you then multiply row X column and add the sum of the products to get the solution to the problem.

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Int Algebra II - Erin Johnson: Can you multiply Matrices?

Good example of what I am looking for...click on the link!

Int Algebra II - Erin Johnson: Can you multiply Matrices?: "To determine whether or not matrices can be multiplied you first have to write a dimensions statement. Example of a dimensions statement: [..."

INT ALG II - Alex Nguyen: Multiplying Matrices

To see what muliplying matrices are about...


INT ALG II - Alex Nguyen: Multiplying Matrices: "Scalar matrix multiplications Distribute the outside number for all the numbers on the inside. When multiplying matrices. We must note..."

Dimensions of a Matrix

Here is a good one from Alex Reid!!!

Dimensions of a Matrix: "

The dimensions of a matrix refer to the number of rows and number columns of a given matrix.

The rows of a matrix are the numbers going horizontally.

The columns of a matrix are the numbers going vertically.

To find the dimensions of a matrix you must multiply the (number of rows x the number of columns). The dimensions for the matrix above would be (2 rows x 3 columns). The dimension of the matrix is 2 by 3 or (2x3).