Сравните 5/33-(7/11-1/3) и 5/33 (1/2-7/11)

5/33 - 7/11 + 1/3 = 5/33 - 21/33 + 11/33 = - 5/33 5/33 × (1/2 - 7/11) = 5/33 × (11/22 - 14/22) = 5/33 × (- 3/22) = - 5/242 - 5/33 < -5/242  =>   (5/33 - 7/11 + 1/3) < (5/33 × (1/2 - 7/11))

x*(x-2)=120

x^2-2x-120=0

d=b^2-4*a*c=4+480=484

x1=(2+22)/2=12

x2=(2-22)/2=-10

числа 12 и 10

или

-10- и -12

а) 5b-bc-5c+c²=5(b-c)-c(b-c)=(5-c)(b-c)

б)xb+by-ax-ay-3x-3y=b(x+y)-a(x+y)-3(x+y)=(b-a-3)(x+y)