Jawabanmu

2014-08-21T12:26:05+07:00
A) (3x^2 - 21x + 2x - 14) - x^2 + 10x
= 2x^2 -9x - 14

b) 12x-20y
2014-08-21T12:29:59+07:00
A) 3x²-21x+2x-17-x²+10x=2x²-11x-17
b) 12x-20y