Question

6,62^2+5,4•3,38+1,22•3,38
------------------------------------------
20,1^2-13^2+33,1•12,7

Answer 1

$=frac{6.62^2+3.38(5.4+1.22)}{(20.1-13)(20.1+13)+33.1*12.9} = \ \ frac{6.62^2+3.38*6.62}{7.1*33.1+33.1*12.9} =frac{6.62(6.62+3.38)}{33.1(7.1+12.9)} =frac{6.62*10}{33.1*20} = frac{6.62}{66.2} =0.1$

0.1*150/100=0.15