z = -2
Объяснение:
(3z-2) (5z+3)-(2z-1)(7z+2) = -4
( 15z^9z2+-10z-6-(14z^2+4z-7z-2) = -4
15z^9z2+-10z-6-14z^2-4z+7z+2+4=0
z^2+2z = 0
z * ( z + 2 ) = 0
z = 0 или z+2=0
z = - 2
z = -2
Объяснение:
(3z-2) (5z+3)-(2z-1)(7z+2) = -4
( 15z^9z2+-10z-6-(14z^2+4z-7z-2) = -4
15z^9z2+-10z-6-14z^2-4z+7z+2+4=0
z^2+2z = 0
z * ( z + 2 ) = 0
z = 0 или z+2=0
z = - 2