Вправи 401 - 500 » 479

Винесіть за дужки спільний множник: 1) 4b + 16c = 4(b + 4c); 2) 12x – 15y = 3(4x – 5y); 3) –8a – 18b = –2(4a + 9b); 4) 24x + 30y = 6(4x + 5y); 5) 10mx – 15my = 5m(2x – 3y); 6) x2 + xy = x(x + y); 7) 3d2 – 3cd = 3d(d – c); 8) 4a2 + 16ab = 4a(a + 4b); 9) a6 – a3 = a3(a3 – 1); 10) b2 + b8 = b2(1 + b6); 11) 7p3 – 5p = p(7p2 – 5); 12) 15c2d – 3cd = 3cd(5c – 1); 13) 14x2y + 21xy2 = 7xy(2x+ 3y); 14) –2x9 + 16x6 = –2x6(x3 – 8); 15) 8a4b2 – 36a3b7 = 4a3b2(2a – 9b5).