bearing in mind that an explicit form is simply the sequence written as a function of some variables, so we simply simplify and add like-terms.

The question is asking us to find the sum. To do this, let's first write the original equation and then take it from there.

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Use distributive property:
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
Combine Like Terms:

Therefore, the answer to your question is
-4x² + 3x + 4. Hope this helps and have a fantastic day!
First, simplify the radicals
√125=√(5*5*5)=(√5*5)(√5)=5√5
so 3√125=3*5√5=15√5
and √16=4
so
15√(5)-4 is the simplified version
First markdown: 0.75($500) = $375
Second markdown: 0.75($375) = $281.25
Third markdown: 0.75($281.25) = $210.94
Similarities:
Have a consistent change for every interval can be represented as functions of a variable points lie on a line.
Differences: linear equations represent all solutions to all x values, whereas arithmetic sequences pick integer spacing