write the wxpression using exponents.

m*m

m to the second

m^2

The expression using exponents for m * m is written as: m^2.

Here's an explanation of how we got this expression:

When we have a number or variable multiplied by itself, we can represent it using an exponent. In this case, we have the variable "m" being multiplied by itself, so we can represent it as m^2.

The exponent "2" indicates that the base (m) is being multiplied by itself exactly two times. So, m^2 is equivalent to m * m.