Розділ 1. ЦІЛІ ВИРАЗИ » 283

Спрости вираз. a) (2ax – 3a2) + (–az – z2) + (4z2 – 5az) = –4z2 – 4az. б) (0,7a – 0,7a2 – 0,7) – (5,7a2 – 4,7a – 1,7) = 0,7a – 0,7a2 – 0,7 – 5,7a2 + 4,7a + 1,7 = –6,4a2. в) –4m2 – (m – n2) + (3m + 4m2) – 2n2 = –4m2 – m + n2 + 3m + 4m2 = n2 + 2m; г) 21/2an – 31/2am – (1/2an + 3,5am – 5) – 1,5an = 21/2an – 31/2am – 1/2an – 31/2am + 5 – 11/2an = 1/2an – 7am + 5.