А.xz+xy+2z+2y = ...x(z+y)+2(z+g)<span>
Б.2ab-2ac+3b-3c = ...2</span>a(b-c)+3(b-c)<span>
В.5ax+10ay+bx+2by = ...5</span>a(x+2y)+b(x+2y)<span>
Г.3ac+6bc+7ax+14 bx = ...3</span>c(a+2b)+7x(a+2b)<span>
Д.2ax+2xy-an-yn = ...2</span>x(a+y)-n(a+y<span>)</span>
У'=9-х^2
9-х^2=0
х=+-3
у(-3)=5-27+9=-13
у(3)=5+27-9=23
Ответ:23
-3/4 у - 5(-1/2 y+1/2)= -( -у -7/12 у)+( -1/6 у -2/3)
- 3/4 у+5/2 у - 5/2=у +7/12 у -1/6 у -2/3
-3/4 у+2 2/4 у -2 1/2= у+7/12 у - 2/12 у -2/3
1 3/4 у - 1 5/12 у=2 1/2 - 2/3
1 9/12 у - 1 5/12 у=2 3/6 - 4/6
4/12 у=1 5/6
1/3 у=1 5/6
у=11/6 :1/3
у=11/6 * 3
у=11/2=5 1/2
5 1/2 :100*500=27 1/2
5 1/2+27 1/2=33
Y=cos²x-√3/2*sin2x
y`=2cosx*(-sinx)-√3/2*2*cos2x=-sin2x-√3cos2x=-2(1/2*sin2x+√3/2cos2x)=
=-2sin(2x+π/3)=0
2x+π/3=0
2x=-π/3
x=-π/6
y(-π/6)=cos²(-π/6)-√3/2sin(-π/3)=3/4-√3/2*(-√3/2)=3/4+3/4=6/4=1,5