Answer:
2(r+4)(r-4)
Step-by-step explanation
First, you want to factor out 2 from both terms, which gives you 2(r^2-16). Then you want to recognize that (r^2-16) is factorable into 2 terms. If you multiply (r+4) by (r-4) then you are given (r^2-16) as a result.
2.5= 2 1/2
just do 10/20= .5 so 7.5
8.2= 8 2/10 which simplifies to 8 1/5
2.88=2 <span>22/<span>25
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3/6= 7.5
3 1/4= 3.25
i couldn't see the other ones except for also 12
2.1= 2 1/10
84.87=115%
x =100%
x=73.8
the number is x=73.8=100%