Algebra Demystified 2nd Ed

Chapter 7 linear equaTionS 209

H kAtt
L

t

H kAtt L HL kAtt HL kAt

= −

= − =− =

();

()

(^121)
12
12
1 −−
++
+=

=

kAt
kAtkAt
HL kAtkAt
HL kAt
kA
kAt
kA
HL
2
22
21
21
kkAt
kA
(^2) =t 1

Landn
Land
Land d
aa
Land d
dd

=+− =+− =+ − −− −= − ++

(); ()

1 1

LLadnd Lad d

nd d Lad d

n

−+= −+=

−+=

S rL a
r

r

S rL a r rSrL a rS SrLa rL rL

= − − = − − −=− −=− −−

1

1 1

;

()

rrS rL Sa SS rS rL Sa rSLSa rS L SL

S

−−=− ++ −=− −=− − −

=

() () ()

−− − = − −

a SL r Sa SL