1)y=xˇ2, y=x-1, xˇ2=x-1,xˇ2-x+1=0, D=1-4=-3, ne perecekajut
2)y=-xˇ2,y=-2x-3, -xˇ2=-2x-3, xˇ2-2x-3=0, D=4+12=16, VD=4
a)x1=1/2(2+4)=3, y1=-9, P1/3,-9/
b)x2=1/2(2-4)=-1,y2=-1, P2/-1,-1/
3)y=xˇ2, y=-x-5, xˇ2=-x-5, xˇ2+x+5=0,D=1-20=-19 ,ne perecekajut
C^2-0,49=c^2-49/100=(c-7/10)(c+7/10)
у=4In(2х-3)
0=4In(2x-3)
0=4In(2x-3), x>\frac{3}{2}
4In(2x-3)=0
In(2x-3)=0
2x-3=1
2x=3+1
2x=4
x=2, x>\frac{3}{2}
x=2
(1-x)²-(x-4)(x+4)=2x
1-2x+x²-(x²-16)=2x
1-2x+x²-x²+16-2x=0
-2x-2x=-1-16
-4x=-17|:(-4)
x=4.25
Ответ: 4,25