The area of triangle is .

              (Substitute )

Group the coefficients and the variables

                   (Cancel common terms)

To multiply  two powers that have the same base, add the their exponents.For any real number a and any integers m and p, power of product property:  .

                                (Apply power of product property: )    

                                (Apply power of product property: )

The area of triangle is square units.

The area of triangle is square units.