------------7@91991919191199191199191. Created by ugolpramae. algebra-ru

------------7@91991919191199191199191...

July 2022 2 12 Report

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

abai27100

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

3 votes Thanks 1

Universalka

Verified answer

а) 35²-25²=600

с) Ответ: 0,5 ; 2/1

е) 47²+2•47•53+53²=10000

2 votes Thanks 3

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