Page 124 - aljaber
P. 124
@ @QQQ@ @pý†bɾa@ @
10 [AHSME 1958] ( )
. 20
2() 1( ) 10 ( ) 1 ()
2 10
x2 −x −a = 0
a ()
x 2 + ax + 1 = 0
3 ( ) 2 ( ) 1 ( ) −1( )
