1) X * ( X - 2) = X^2 - 2X 2) (X + 1)*( X + 3 ) = X^2 + 3X + X + 3 = X^2 + 4X + 3 3) X^2 - 2X - X^2 - 4X - 3 = 4 - 6X - 3 = 4 - 3 - 4 = 6X 6X = ( - 7 ) X = ( - 7\6 ) = ( - 1 1\6 )
Х(х-2)-(х+1)(х+3)=4 х²-2х-(х²+4х+3)=4 х²-2х-х²-4х-3=4 -6х=7 х=-1 1/6