... :yx−+−−+−++1;710 3 ;562; 32 32 ; 13 2;1;25222;2 03 1;525;105 3 3 6. Rút gọn các biểu thức sau :( ) ( )( )( ) 3 11511 33 752484 3 3412 3 4) 32 :6.)2 (35 3275 238 18)8041 534 949 3 45202 3 45)4+−+−+−−−−++−+−−+−21 ... 7 33 3- 4x52x )1186x45 i) 3 262212275) 3 811xx g) 117119)1161 30 67x e) )4)(2(88422) 3 1)2) (3( 53x c) 3 1 30 3- x16 b) 1181-x12 ) 234 222 3 23 2=−+−+=+=−+=++−−+=−+++++=−−++++−=−−+++−+=+−−−=+−+−=−+=+−xxxjxxxxxhxxxxxxxxfxxxxxxxxxxxxxxdxxxxxxa ... :acxxabxx=−=+2121.16abxabx'';''21∆−−=∆+−=abxabx2;221∆−−=∆+−===+==+=+==+==+=+=+===+=+=29 32 3 532 2 h) 96y-0,75x-2,64y0 ,35 x g) 18785272154 53 f) -813y12x57y-8x )414y9x14,2y3,3x d) 0,521y15x89y-10x c) -243y-4x167y4x b) 31 11y10x-711y-2x )yxyxyxyxeaBaứi...