Răspuns :
Răspuns:
N=243²-240²+3×240
N=(243-240)×(243+240)+720
N=3×483+720
N=1449+720
N=2169
N = 243² - 240² + 3×240
= (243 - 240)(243 + 240 ) + 720
= 3×483 + 720
= 1449 + 720
= 2169
Răspuns:
N=243²-240²+3×240
N=(243-240)×(243+240)+720
N=3×483+720
N=1449+720
N=2169
N = 243² - 240² + 3×240
= (243 - 240)(243 + 240 ) + 720
= 3×483 + 720
= 1449 + 720
= 2169