( )( )) 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...

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) x

²

−8x+16=0 ) x

2

10 25e − x = − ^{f) 5x}

(

^{x− = −1}

)

^{x 1}

( )

²

) 2 5 5 0g x+ −x − x= h) x

²

+5x− =6 0 i) x

³

−5x

²

+8x− =4 0 ^{i) 2}

(

^x+3

)

²

⁻⁴

(

^x+1

)(

^{x− =1}

)

⁴⁹

3

2

) x 1 0j + x + + =x k) x

³

−x

²

=4x

²

−8x+4 m) 2x

³

−x

²

+3x+ =6 0. n) (x

²

+x x)(

²

+ + =x 1) 6. o)(x

²

−4 )x

²

−8(x

²

−4 ) 15x + =0. p)

(

^x−1

) (

³

^{+ 2−x}

) (

^4+2x+x

²

)

^{+3x x}

⁽

⁺²

⁾

^=17. b)

(

^x−2

) (

³

^{− x−3}

) (

^x

²

^+3x+9

)

⁺⁶

⁽

^x+1

⁾

²

^=15.