Jawabanmu

2014-08-19T15:09:36+07:00
A) = -c+2b
b)  = 3y² -4y² - 3y +4 = -y² -3y+4
c) 2x² -3x +5 -6 +4x² = 6x² - 3x -1
d) 4xy² -5x²y - 2x²y +8xy² = 12xy² -7x²y