A reader should summarize the development of a theme by stating the theme, by using objective language and by using examples to explain the theme. The theme of the story refers to its topic or its central idea. The main way to build a theme is through characterization, motifs, and symbols. With these three things, the theme can be easily understood and constantly present in your story.
Answer:


Explanation:
Given


Required
Evaluate when 

Substitute 2 for x

Evaluate the expression in bracket

Remove bracket



Substitute 2 for x



ABSOLUTELY. Discoveries come from mistakes. Think about it. If the inventor of a fridge didn't find out that his/her food spoiled, would we have a fridge? No, probably not. Mistakes cause discoveries, and we learn from mistakes.
I redrew one of your positive and negative connotation for the denotation below "to be older ".