Jawabanmu

2014-08-12T19:01:33+07:00
20x2-15xy + 15x2 + 6xy
35x2-9xy

x2= x pangkat 2
2014-08-12T19:02:34+07:00
5x(4x-3y) + 3x(5x+2y)= 20x²-15xy + 15x²+6xy=35x²-9xy