Question

------------7@91991919191199191199191​

Answer 1

а) 35²-25²=600

с) Ответ: 0,5 ; 2/1

е) 47²+2•47•53+53²=10000

Answer 2

$1)35^{2}-25^{2}=(35-25)(35+25)=10*60=\boxed{600}\\\\\\2)\frac{39,5^{2}-3,5^{2}}{57,5^{2}-14,5^{2}}=\frac{(39,5-3,5)(39,5+3,5)}{(57,5-14,5)(57,5+14,5)} =\frac{36*43}{43*72}=\frac{1}{2}=\boxed{0,5}\\\\\\3)47^{2} +2*47*53+53^{2}=(47+53)^{2}=100^{2}=\boxed{10000}$