Answer:
Dantes mistake is that he mutiplied the exponents which has the same base so you can add it. The answer should be [tex]5^{7}[/tex].
Alex mistake is that he didnt subtract so it should be [tex]8^{3} - (-8^{-2})[/tex] and then you subtract the exponents and get [tex]8^{5}[/tex]
Step-by-step explanation:
