( )( )) 5 2 1 0A X+ X+ = B) X(X+2) (−3 X+2)=0 ( ) ( )) 2X 5 3 2 26C X− −X + X = D) X2 −8X+16=0 ) X2 10 25E − X = − F) 5X(X− = −1) X 1 ( ) 2) 2 5 5 0G X+ −X − X= H) X2 +5X− =6 0 I) X3 −5X2 +8X− =4 0 I) 2( X+3)2 −4(X+1)(X− =1) 493 2) X 1 0J + X + + =X K) X...

Question

Bài 3: Tìm x, biết: ( )( )) 5 2 1 0a x+ x+ = b) x(x+2) (−3 x+2)=0 ( ) ( )) 2x 5 3 2 26c x− −x + x = d) x2 −8x+16=0 ) x2 10 25e − x = − f) 5x(x− = −1) x 1 ( ) 2) 2 5 5 0g x+ −x − x= h) x2 +5x− =6 0 i) x3 −5x2 +8x− =4 0 i) 2( x+3)2 −4(x+1)(x− =1) 493 2) x 1 0j + x + + =x k) x3−x2 =4x2 −8x+4 m) 2x3 −x2 +3x+ =6 0. n) (x2 +x x)( 2 + + =x 1) 6. o)(x2 −4 )x 2−8(x2 −4 ) 15x + =0. p) (x−1) (3 + 2−x) (4+2x+x2)+3x x( +2)=17. b) (x−2) (3 − x−3) (x2 +3x+9)+6(x+1)2 =15.

Answer

Bài 3: Tìm x, biết: ( )( )) 5 2 1 0a x+ x+ = b) x(x+2) (−3 x+2)=0 ( ) ( )) 2x 5 3 2 26c x− −x + x = d) x2 −8x+16=0 ) x2 10 25e − x = − f) 5x(x− = −1) x 1 ( ) 2) 2 5 5 0g x+ −x − x= h) x2 +5x− =6 0 i) x3 −5x2 +8x− =4 0 i) 2( x+3)2 −4(x+1)(x− =1) 493 2) x 1 0j + x + + =x k) x3−x2 =4x2 −8x+4 m) 2x3 −x2 +3x+ =6 0. n) (x2 +x x)( 2 + + =x 1) 6. o)(x2 −4 )x 2−8(x2 −4 ) 15x + =0. p) (x−1) (3 + 2−x) (4+2x+x2)+3x x( +2)=17. b) (x−2) (3 − x−3) (x2 +3x+9)+6(x+1)2 =15.

( )( )) 5 2 1 0A X+ X+ = B) X(X+2) (−3 X+2)=0 ( ) ( )) 2X 5 3 2 26C X− −X + X = D) X2 −8X+16=0 ) X2 10 25E − X = − F) 5X(X− = −1) X 1 ( ) 2) 2 5 5 0G X+ −X − X= H) X2 +5X− =6 0 I) X3 −5X2 +8X− =4 0 I) 2( X+3)2 −4(X+1)(X− =1) 493 2) X 1 0J + X + + =X K) X...

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