7. 40 = (1 + 6-2) + 5
3.
6. 17-18-15 + 110 - 5
8. 1166-113 + 1417 +31 +9
o sim
Answers
Answered by
1
Answer:
Step-by-step explanation:
1397 x 1397 = (1397)2
= (1400 - 3)2
= (1400)2 + (3)2 - (2 x 1400 x 3)
= 1960000 + 9 - 8400
= 1960009 - 8400
= 1951609.
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