then I can't remember if it's acceptable to distribute, so
You can't distribute because what is in parenthesis is raised to a power. If you want to distribute, you'd need to raise the binomial to the exponent first (PEMDAS).
You can't distribute because what is in parenthesis is raised to a power. If you want to distribute, you'd need to raise the binomial to the exponent first (PEMDAS).