5y²-(3y-1)(5y-2)= 5y²-15y²-6y-5y+2= -10y²-11y+2= 2+11y-10y²
(a+ b)/8c³ * 16c³/(a+b) =2
(m+n)/(m-n) : 3m/(m-n)=(m+n)/(m-n) * (m-n)/3m=(m+n)/3m
(x+y)/(x-1) : (y-2)(/(4x- 4)=(x+y)/(x-1) * (4(x-1))/(y-2)=4(x+y) / (y-2)
(5n-5m)/(3(a+2)) * (2a²+a³)/(n-m)=(5(n-m))/(3(a+2)) * (a²(2+a))/(n-m)=5a²/3
.
(7a+7b)/5c² * 14c/(6b+6a)=(7(a+b))/5c² * 14c/(6(b+a))=21/30c=7/10 c
при с=3,5
7*3,5/10=24,5 : 10=2,45
(b-5)/(4-4c) : (b² -25)/(c-c²)=(b-5)/(4(1-c)) * (c(1-c))/((b-5)(b+5))=c/(4(b+5))
при b=2, c= -35
- 35/(4(2+5))= - 35/28= - 5/4= - 1.25
5x^2-2x+9>(x+3)^2
5x^2-2x+9>x^2+6x+9
4x^2-8x+9-9>0
4x^2-8x>0
4x(x-2)>0
4x=0
x=0
или
x-2=0
x=2
Ответ:
С-бос муше
[tex]ax^{2} + bx + c = 0[/tex
дискриминант или виетпен табасн
0 - 0 + 1 = 1
sin² 2π = 0
cos² ( -3π/2) = 0
sin²(-3π/2) = 1