1м=10 дм
46030 дм
10=4603
м=4000м
630дм
У-х=-5
<span>х2-2ху-у2=17 </span>
у=х-5
<span>х^2-2х(х-5)-(х-5)^2=17 </span>
у=х-5
<span>х^2-2х^2+10x-х^2+10x-25-17=0 </span>
у=х-5
<span>-2х^2+20x-42=0 </span>
D=16
x1=7
y1=2
x2=3
<span>y2=-2</span>
1 + 1000 = 1001
2 + 999 = 1001
=>
1000/2*1001 = 500500