2 ) b) (24x
3y
2 – 18 x
2y
3 – x
4y
2) : (– 6x
2y
2)
a) (–2x
3) ( x
2 + 5x –
( ) ( )
2x y y xy
2 4
x x x
d)
2 2x xy x y
x x
2 2
c)
3 24 3
) :
d x x x
3 4 9 16 4 3
2
Bạn đang xem 2 ) - DE THI HKITOAN20112012