ПЛИЗ СРОЧНО. Вычисли:
1) 41^2 – 31^2
б) 72
в) 720
г) 730
2) 26^2 – 74^2
е) – 4800
ж) 4800
з) – 480
Вычисли:
1) 76^2 – 24^2
а) – 520
в) 5200
c) 52
2) 83^2 –73^2
e)1560
ж) 156
з) 1540
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