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1/2x+4=-7/4x-5
2/4x+7/4x=-5-4
9/4x=-9
x=-4
y=-2+4=2
D=(-4,2)
2. Wspolrzedne punktu B=(x,y)
1/2*(x-6)=-4
x-6=-8
x=-2
1/2*(y+1)=2
y+1=4
y=3
B=(-2,3)
3. Prosta CB:
y=ax+b
a=-1
-1*(-2)+b=3
b=3-2=1
CB: y=-x+1
4. Wspolrzedne punktu E
x+11=-x+1
2x=-10
x=-5
y=-(-5)+1=6
E=(-5,6)
5. wspolrzedne punktu C=(x,y)
1/2*(x-2)=-5
x-2=-10
x=-8
1/2*(y+3)=6
y+3=12
y=9
C=(-8,9)
6. rownanie prostej CE zawierajacej wysokosc h.
y=ax+b
1/2*a=-1
a=-2
y=-2x+b
-2*(-8)+b=9
16+b=9
b=-7
Odp. y=-2x-7.