Вправи: 461

461. Виконайте дії:

1) (2a2a-1 + 1) • 6a-34a2- a = 2a+2a-12a-1 • 3(2a-1)a(4a-1) = 4a-1 • 3 • (2a-1)2a- • a(4a-1) = 3a;

2) (m + m23-m) : m+3m-3 = 3m- m2+ m23-m : m+3m-3 = 3m(m-3)-mm-3(m+3) = –3mm+3;

3) (aa-b – aa+b) : aba+b = a2+ ab- a2+ aba-b(a+b) : aba+b = 2ab • (a+b)a-ba+bab = 2a-b;

4) (p – p2- 3p+1) • p2- 1p+3 = p2+ p- p2+ 3 • p-1(p+1)p+1 • (p+3) = p – 1.