ГДЗ Алгебра 7 клас Істер (2024)

Спростіть вираз: 1) (1 + 2p) + (p2 – p) = 1 + 2p + p2 – p = p2 + p + 1;
2) (5a2 + a3) – (–a + 5a2) = 5a2 + a3 + a – 5a2 = a3 + a;
3) (x2 – 5x) + (5x – 13) = x2 – 5x + 5x – 13 = x2 – 13;
4) (3b3 – 5b2) – (5 + 3b3 – 2b2) = 3b3 – 5b2– 5 – 3b3 + 2b2 = –3b2 – 5.