Odpowiedzi

2010-02-28T17:38:51+01:00
A) 3(2x-1)+4(1-x)= 6x - 3 + 4 - 4x = 2x +1
b)2(7x+5)-6(x-2)= 14 x + 10 - 6x + 12 = 8x + 22
c)-2x(8-x)-5(x²+3x)= -16x + 2x² - 5x² - 15x = -31x - 3x²
d)5(3-2x)-(4x+6)*3 = 15 - 10 x - 12x - 18 = -22x - 3

2010-02-28T17:39:56+01:00

a) 3(2x-1)+4(1-x)= 6x - 3 + 4 - 4x = 2x +1


b)2(7x+5)-6(x-2)= 14 x + 10 - 6x + 12 = 8x + 22


c)-2x(8-x)-5(x²+3x)= -16x + 2x² - 5x² - 15x = -31x - 3x²


d)5(3-2x)-(4x+6)*3 = 15 - 10 x - 12x - 18 = -22x - 3