Question

How do you expand `(3z - 2)^2`?

Answer 1

See the entire solution process below:

Explanation:

To square a term of the form `(a - b)^2` use this rule:

`(a - b)^2 = a^2 - 2ab + b^2`

Substitute `3z` for `a` and substitute `2` for `b` giving:

`(3z - 2)^2 = (3z)^2 - 2(3z * 2) + 2^2 = 9z^2 - 12z + 4`