Odpowiedzi

2009-12-09T18:40:47+01:00
A) (3-a) ² = 9+a²-6a
b) (12x-5y) * (12x+5y) = 144x²-25y²
c) (3x+y)² = 9x²+6xy+y²
d) (5a+5b)² = 25a²+25b²+50ab
2009-12-09T18:40:39+01:00
(3-a)²= 9-6a+a²
(12x-5y)*(12x+5y)= 144x²-25y²
(3x+y)= 9x²+ 6xy+ y²
(5a+5b)²= 25a+50ab+ 25b²