Inverse of a 2x2 matrix

The  exercise appears under the Precalculus Math Mission. This exercise practices finding the inverse of a 2x2 matrix.

Types of Problems
There are two types of problems in this exercise.
 * 1) Which matrix is invertible? What is its inverse?: This problem provides two 2x2 matrices. The student is expected to determine which matrix is invertible and what its inverse is and write it in the space provided. Inverse.png
 * 2) What is the (matrix name) to the power of -1?: This problem provides a 2x2 matrix. The student is asked to see if (matrix name) to the power of -1 exists, and if it does write, in the space provided, what it is. InverseMatrix.png

Strategies

 * 1) Students need to remember how to find the determinant of a matrix, make it a fraction, and multiply it to the adjugate of the matrix.
 * 2) Students also needs to know how to find the adjugate of the matrix.

Real-life Applications

 * 1) Matrix mathematics applies to several branches of science, as well as different mathematical disciplines.
 * 2) Matrix arithmetic helps us calculate the electrical properties of a circuit, with voltage, amperage, resistance, etc.