Question

$frac{a ^{2}+10a+25 }{2a+10}$

Answer 1

$frac{a ^{2}+10a+25 }{2a+10} = frac{(a+5)^2 }{2(a+5)} =frac{a+5}{2}$

Answer 2

$= frac{a^2+2*5*a+5^2}{2(a+5)} = frac{(a+5)^2}{2(a+5)} = frac{(a+5)}{2} =0.5(a+5)=0.5a+2.5$