👤
a fost răspuns

712 – 372 – 51 = (712 – 372) – 51 = (71 – 37) ( 71 + 37) – 51 =??

Răspuns :

712-372-51=(712-372)-51=(71-37)(71+37)-51=
340-51=340-51=71·71+37·71-37·71-37·37-51=
289=289=5041+2627-2627-1369-51
289=289=5041-1369-51=
289=289=3672-51=
289=289=3621=