a/ 5( x + 2 ) - x = -16
<=> 5x + 10 - x + 16 = 0
<=> 4x + 26 = 0
<=>x = -13/2
b/ 6( x - 5 ) + 46 = 1
<=> 6x - 30 + 46
<=> 6x + 16=0
<=> x = -4/3
c/ ( x - 5 )( 4x + 3 ) = 0
Hoặc x-5 = 0 <=> x = 5
Hoặc 4x+3 = 0 <=> x = -3/4
d/ 3( x + 2 ) +  ( x + 2 )( x + 2 ) = 0
<=> (x+2)(3+x+2)=0
<=> (x+2)(5+x)=0
Hoặc x+2 = 0 <=> x=-2
Hoặc 5+x = 0 <=> x=-5
e/ ( x + 2 )( x + 2 ) + 3( x - 5 ) = ( x + 1 )( x - 1 )