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  4. Істер

Номер 13

Заповніть у зошиті наступні таблиці:

m 2 3 –1 0 –2
n 1 2 0 –5 –3
2m – 3n 1 0 –2 15 5

m = 2; n = 1: 2m – 3n = 2 · 2 – 3 · 1 = 4 – 3 = 1;
m = 3; n = 2: 2m – 3n = 2 · 3 – 3 · 2 = 6 – 6 = 0;
m = –1; n = 0: 2m – 3n = –1 · 2 – 3 · 0 = –2 – 0 = –2;
m = 0; n = –5: 2m – 3n = 2 · 0 – 3 · (–5) = 0 + 15 = 15;
m = –2; n = –3: 2m – 3n = –2 · 2 – 3 · (–3) = –4 + 9 = 5.

x –1 0 1 2
x2 + 2 3 2 3 6
x2 + 2x –1 0 3 8

x = –1: x2 + 2 = (–1)2 + 2 = 1 + 2 = 3; x2 + 2= (–1)2 + 2 · (–1) = 1 – 2 = –1;
x = 0: x2 + 2 = 02 + 2 = 2; x2 + 2x = 02 + 2 · 0 = 0;
x = 1: x2 + 2 = 12 + 2 = 3; x2 + 2= 12 + 2 · 1 = 1 + 2 = 3;
x = 2: x2 + 2 = 22 + 2 = 4 + 2 = 6; x2 + 2x = 22 + 2 · 2 = 4 + 4 = 8.

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