Вычислить: 42^2-12^2 / 16^2+2*16*14+14^2

[latex] \frac{42^2-12^2}{16^2+2*15*14+14^2} = \frac{(42-12)(42+12)}{256+448+196} = \frac{30*54}{900} = \frac{1620}{900} = \frac{9}{5} =1 \frac{4}{5} =1,8[/latex]