А) 4/3, 3/4, 3/2, 2/3.
б) 7/4,5/3, 4/7, 3/5.
11 121+199/300 = 11 320/300 = 12 20/300 = 12 1/15
1/8=0.125
3/8=0.125*3=0.375=>3/8-0.375=0
<span>3х + ху</span>² - х²<span>у - 3у = 3x - 3y</span> - x²y + xy² = 3 * (x - y) - xy * (x - y) =
(3 - xy) * (x - y)