Вправи 201 - 300 » 218

218. Виконайте ділення: 1) (x – 3) : (x-3)/9 = (x-3)/1 • 9/(x-3) = ((x-3)•9)/(x-3) = 9; 2) (3x – 1) : (3x-1)/3 = (3x-1)/1 • 3/(3x-1) = ((3x-1)•3)/(3x-1) = 3; 3) (2x – 2) : (x-1)/8 = (2x-2)/1 • 8/(x-1) = ((2x-2)•8)/(x-1) = (2(x-1)•8)/(x-1) = 16; 4) (3a + 1) : (3+9a)/2 = (3a+1)/1 • 2/(3+9a) = ((3a+1)•2)/(3+9a) = ((3a+1)•2)/(3(1+3a)) = ((3a+1)•2)/(3 •(3a+1)) = 2/3; 5) (ax + 2a) : (x+2)/2a = (ax+2a)/1 • 2a/(x+2) = ((ax+2a)•2a)/(x+ 2) = (a(x+ 2) •2a)/(x+2) = 2a2 6) (3b – ab) : (2a-6)/2b = (3b-ab)/1 • 2b/(2a- 6) = ((3b-ab)•2b)/(2a-6) = (b(3-a)•2b)/(2(a-3)) = –((a-3)• 〖2b〗^2)/(2(a-3)) = –b2.