Odpowiedzi

2010-03-28T11:11:15+02:00
A = 3y-x
Ob = 2*a+2*b
Ob = 2x+6y
2x+6y=2*(3y-x)+2*b
2x+6y=6y-2x+2b
4x=2b
b=2x
P=a*b
P = (3y-x)*2x=6xy-2x²
Najlepsza Odpowiedź!
2010-03-28T11:29:27+02:00
1 bok - a
2 bok - b = 3y-x
ob = 2a+2b = 2x+6y
2a+2(3y-x) = 2x+6y
2a+6y-2x = 2x+6y
2a = 4x
a = 4x/2
a = 2x

P = ab
P = 2x*(3y-x)
P = 6xy-2x²
P = -2x²+6xy