Đáp án:
a) (3x+2) (x-1) -3(x+1) (x-2)=4
=> 3X²-3X+2X-2-(3X+3)(X-2)=4
=> 3X²-3X+2X-2-(3X²-6X+3X-6)=4
=> 3X²-3X+2X-2-3X²+6X-3X+6-4=0
=> 2X+0=0
=>X=0
B) 2- (3X-7)/4+(X+17)/5=0
=> 40-5(3X-7)+4(X+17)=0
=> 40-15X+35+4X+68=0
=> -11X+143=0
=> -11X=-143
=> X=13
BẠN THAM KHẢO NHA!!!