b)
52-5/6= (6*52-5) /6= (312-5)/6=307/6 = 51 7/6
d)
55-2 2/5= 55 -12/5 = (55*5-12)/5=(275-12)/5=263/5= 52 3/5
l)
53 7/8 - 9/10 = (431/8 – 9/10 =(431*10-9*8) / 80 =(4310-72)/80=4238/ 80= =52 70/80=52 7/8
p)
233 3/10- 1 11/15=2333/10 - 26/15=(2333*6-26*9)/90=(13998-234)/90= =13764/90=152 42/45
<span>√121-10√6,4•√0,1=
11-10</span>√(6.4*0.1)=
11-10√0.64=
11-√(0.64*100)=
11-√64=
11-8=3
Вместе х напишем 1.
3*1^2-а*1=0.
3-а=0
а=3.
A)
-3x+2=0
x= 2/3
b)
x^2 -81=0
x1=9 x2= -9
-(3х-0,4)+(0,4-3)=-3х+0,4+0,4-3=-3х-2,2