Slide 1

: , -

X+3=8 ()

- -) ) ) )

X+= : : x+5=7,y+2=8,z+5=0 : (x+1)(x-1)= _ 1

8

x+2=8X+5=0 :(y+2)(y-1)=(y-2)(y+4)

:(y+2)(y-1)=(y-2)(y+4),y.y-y+2.y-2=y.y-4.y-2y-8,y-2=2.y-8,y-2.y=-8+2,-y=-6,y=6. y=6 2 6 ?

:, x;, x+2.:. 10x+(x+2).,11x+2:. 10(x+2)+x ,11x+20

151 , ?..

? ....

15 56 ; ?