f=gg, +ri, g=r92+n2 2=g-42=g-(f-g41)q2 q2.f+(1+q1q2)g (f,g)=(x+1)=-42(x) 4q2f-4(1+q1q2)g l(x)=42=x+1 v(x)=-4(1+q12)=-(4+x2-1)=-x2-3 (l,v)=120 , . 1 1 1 2 2 f = gq + r g = rq + r (1 ) . ( ) . 2 1 2 2 1 2 1 2 q f q q g r g r q g f gq q = − + + = − = − − 2  = + = − ( , ) ( 1) 4 ( ) f g x r x 2 1 2 = − + 4 4(1 ) q f q q g 2  = = + u x q x ( ) 4 1; 2 2 1 2 v x q q x x ( ) 4(1 ) (4 1) 3 = − + = − + − = − − ( , ) 1 u v =