Odpowiedź:
zad 46
a) 102² = (100 + 2)² = 100² + 2 * 100 * 2 + 2² =
= 10000 + 400 + 4 = 10404
b) 99² = (100 - 1)² = 100² - 2 * 100 + 1² = 10000 - 200 + 1 =
= 9800 + 1 = 9801
c)
301² = (300 + 1)² = 90000 + 2 * 300 + 1 = 90000 + 601 = 90601
d)
45² = (40 + 5)² = 1600 + 400 + 25 = 2025
e)
9,8² = (9 + 0,8)² = 81 + 14,4 + 0,64 = 96,04
f)
5,1² = (5 + 0,1)² = 25 + 1 + 0,01 = 26,01
