Вправи: 329

329. Спростіть вираз.

a) 4abb2-a2 : (1b2- a2 + 1b2+2ab+a2) = 3abb2-a2 : (1b2-a2 + 1(a+ b)2) = 4abb2- a2 : a+ b+ b- a(b- a)(a+ b)2 = 4abb2-a2 • (b- a)(a+ b)22b = 2a(a + b);

б) 3c-3c2-4 • c+2c2-2c+1 – 3(c+2)c2-4 = 3(c-1)(c-2)(c+2) • c+2(c-1)2 – 3(c+2)(c-2)(c+2) = 3(c-1)(c-2) – 3c-2 = 3-3c+3(c-1)(c-2) = 6-3c(c-1)(c-2) = -3(c-2)(c-1)(c-2) = 31- c.