Номер 1212
1) Якщо m = –1/3, тоді 2/3 – m2 = 2/3 – (–1/3)2 = 2/3 – (–1/3) • (–1/3) = 6/9 – 1/9 = 5/9
Якщо m = –2/9, тоді 2/3 – m2 = 2/3 – (–2/9)2 = 2/3 – (–2/9) • (–2/9) = 2/3 – 4/81 = 54/81 – 4/81 = 50/81
2) Якщо n = –3, тоді n3 – 1,2 = (–3)3 – 1,2 = (–3) • (–3) • (–3) – 1,2 = 9 • (–3) – 1,2 = –27 – 1,2 = –28,2
Якщо n = –0,6, тоді n3 – 1,2 = (–0,6)3 – 1,2 = (–0,6) • (–0,6) • (–0,6) – 1,2 = 0,36 • (–0,6) – 1,2 = –0,216 – 1,2 = –1,416