CHUYEN DE PHUONG TRINH BAC NHAT MOT AN ( CHUYEN DE PHUONG TRINH BAC NHAT MOT AN 2018 ) 5,
giải phư 29,4 x 3+ 21 x +21 x +4=0 ơngtrình sau 30,2 x −7 x + x −7 x +2=0 1,6 ( x +3 ) −9 ( x+ )+ ( x +6 )=0 31, x +2 x +3 x3 +3 x 2+ x +1=0 2, ( x −6 ) −25=0 32,2 x −x + x +3=0 2 3, ( x−5 ) −9 ( x +5 ) =0 33,24 x3 −26 x2 +20 x=20 x 2−9 x +6 4, ( x−6 ) = (3 x +5 ) ( 6−5 x ) 5, x + x 3+ x2 + x +1=0 3 34, x + x −4 x +5 x−3=0 6, x + y + ( x + y ) +30 xy =2000 35 , x −9 x + x −9 x +2=0 , x 4−x +2 x 2−x +1=0 36 , 64 +25 x +12 x 2−25 x +6=0 8, ( x 4−5 x 2−36 ) ( 8−3 x ) 37 , x −21 x +74 x −105 x+ 50=0 ¿ ( x 2−9 ) ( x +4 ) ( x +3 ) 38,6 x + x 3−36 x 2−7 x +6=0 11,, ( x−1 ) + ( x+3 ) =242 ( x+1 ) 12, ( 4−x )5+ ( x −2 )5=32 13, x ( x 2−1 ) ( x+2 ) =24 14, ( x +2 ) ( x+3 )( x−5 )( x−6 )=180 15,2 x ( x−1 ) ( x−1 )=9 16, ( x +1 )( x +1 ) (2 x +3 )=18 17, ( 12 x+ ) (3 x +2 ) ( x +1 )=3 3 19, ( x−1 )3 + ( x−3 )2 + ( x−5 ) ¿ ( x−1 )( x−3 ) ( x−5 ) 20, ( x +9 )( x +10 ) ( x+11 )−8 x=0 21, ( x2 +3 x +2 ) ( x2 +7 x +12 )=24 22, ( x2 −3 ) +3 ( x−1 )=x ( x−1 ) 23, ( x +3 ) −10 x 3−15 x=0 24, ( x2 −4 x +11 ) ( x −8 x 2+21 ) =35 25, ( x2 +3 x +2 ) ( x2 +7 x +12 )=2 x 26, ( x +2 ) ( x+ )( x +8 )( x +12 )=4 x 27, (10 x +14 )4−10 ( x +1 )4 =256 2 + ( x 2−100 x+ 199 )=0 10, ( x +1 )4 + ( x −3 )4 =82 18, ( x +1 ) + ( x−2 ) = (2 x−1 ) 39 , ( x2 −x+1 ) + ( x2 −2 x +3 ) + … 9, ( x+3 ) −( x−1 ) =56 28, x −4 x −19 x +106 x=120