Identifying Quadratic Equations and Circles

The Standard Form of a Circle: (x-h)^2+(y-k)^2=r^2

The Standard Form of a Quadratic Equation: ax^2+bx+cy^2+dy=e

To find out whether an equation is a Circle, Hyperbola, Ellipse, or a Parabola use the equation: Ax^2+Cy^2=E.

If A=C, the equation is a CIRCLE.
If A does NOT equal C and has the same sign, the equation is an ELLIPSE.
If A=C, but has different signs, the equation is a HYPERBOLA.
If A or C are 0, the equation is a PARABOLA.

Can you multiply these matrices?

In order to know if you can multiply a couple matrices , the number of columns in the first matrix must equal the number of rows in the second matrix. So yes , you can multiply these matrices.



You can multiply these matrices too . The number of columns in matrix one equal the number of rows in the second.