(15+23)² = 15²+2·15·23+23² = 225+60*23+529 = 1444
Лучше так:
(15+23)² = 38² = (30+8)² = 30²+2*30*8+ 8² = 900+480+64 =1444
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(15+23)² = 15²+2·15·23+23² = 225+60*23+529 = 1444
Лучше так:
(15+23)² = 38² = (30+8)² = 30²+2*30*8+ 8² = 900+480+64 =1444
Verified answer
15+23=3838*38=1444
вот так