IMathAS-libretexts

Simplifying Expressions and Fractions Mini-Lesson Review
Below are five examples of simplified expressions. Identify which of them are incorrect. Check all that apply.
$\displaystyle -{5}^{{2}}=-{25}$ $\displaystyle {27}\div{3}\cdot{2}={9}\cdot{2}$ $\displaystyle {\left(-{3}\right)}^{{2}}=-{3}^{{2}}$ $\displaystyle \frac{{{4}+{7}}}{{2}}={4}+{7}/{2}$ $\displaystyle {\left({3}+{2}\right)}^{{2}}={3}^{{2}}+{2}^{{2}}$