Odpowiedzi

2010-04-11T17:01:13+02:00
{2/3x + y=5 /*3
{x-2y=4
{2x+3y=5
{x=4+2y
2(4+2y)+3y=5
8+4y+3y=5
7y=-3
{y=-3/7
{x=4+2*-3/7
x=22/7
{x=3 i 1/7
{y=-3/7

{-1/5x-y=4
{x+6y=1
{x=1-6y
{-1/5(1-6y)-y=4
-1/5+6/5y-y=4
-1/5y=19/5
{y=-19
{x=1-6*-19
{x=-113
{y=-19

*L=36cm
L=a+b+c
3:4:5
a:b:c
a=3*3=9
b=4*3=12
c=5*3=15
L=15cm+9cm+12cm=36cm
odp boki trtojkata maja 9cm,12cm i 15 cm

Mam nadzieje ze pomoglam,pozdrawiam ;)