The simplified form of R(x) is 
<h3>Simplifying an expression </h3>
From the question, we are to simplify the expression
From the given information,

and

Also,

∴ 

Factoring each of the quadratics



Simplifying




Hence, the simplified form of R(x) is 
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Answer: D
Step-by-step explanation: i did the exam.
- ∆ABD is right angled hence area:-




There is only one option containing 6x^2 i.e Option D.
Hence without calculating further
Option D is correct
I think 2 miles hoped this helped
Answer:
2) Right angles always equal 90°
3) m∠F = 90° and m∠G = 90° which means they have the same angle measure.
4) Removing the m and replacing with the congruent symbol.
I'm not too sure how this goes but it should be something like that.