Odpowiedzi

2010-01-27T14:32:42+01:00
A) 3x+3y-18-10x+5y-15+4x-12-4y=-3x-4y-45
b)8a+8b-a+b-14a+14b=-7a+23b
c)x²-5x-8+2x²+6x+7=3x²+x-1
3 5 3
2010-01-27T14:36:15+01:00
A) 3(x+y-6) - 5(2x-y+3)+4(x-3-y)= 3x+3y-18-10x-5y-15+4x-15-4y=-3x-6y-45
b)8(a+b)-(a-b)-7(2a-2b)=8a+8b-a+b-14a+14b=-7a+23b
c)( x do potegi drugiej -5x-8)+(2x do potegi drugiej+6x+7)=x²-5x-8+2x²+6x+7=3x²+x-1
2 4 2