Quadratic Functions

If A and C have different signs (2x^2 -2y^2=6) then the equation is a hyperbola.

If A and C are not equal and they have the same signs (4x^2+6y^2=49) then the equation is an elipse.

Identifying Quadratic Functions

If you have an equation like 5x² + 5y²=25 The equation is a circle, because "a" is equal to "c"

If "a" or "c" equals 0 the equation is a parabola (for example: x² + 2y= 6)

Dimension Statements

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] [246][5 6] [7 8 9]
[11 3]The dimension statement for this would be 3X2 times 2X3.
The numbers on the inside must be the same in order to be able to multiply
The numbers on the outside tell what the dimension of the solution will be. In this particular problem, the solution will be a 3 X 3 matrix.

Identifying Matrices 3

This matrix is a three by three matrix but it is also known as a square matrix because it has the same number of rows and columns an identity matrix. An identity matrix has one going fom one corner to the next.

Identifying Matrices 2

This matrix is a three by two matrix. Three rows by two columns.

Identifying matrices

In order to identify a matrix you go row-by-column. Rows go across and columns go up and down. This matrix is a three by three matrix seeing as how it has three rows and three columns. BUt it is also a square matrix because it has the same numbers of rows as it does columns