Modulus Squared of a Complex Number

Consider the complex number z = 3 + 4i, where i is the imaginary unit, satisfying i^2 = -1. Determine the modulus of the complex number z, which is defined as |z| = ext{sqrt}(a^2 + b^2), where z = a + bi.

In this case, identify the value of |z|^2 to find the answer.