Question

3x(2x-5)-8x(4x-3), если x=-1

Answer 1

3*(-1)* (2*(-1)-5)-8*(-1)*(4*(-1)-3)=
-3*(-7)+8*(-7)=21-56= -35

Answer 2

3х( 2х - 5 ) - 8х( 4х - 3 ) = 6х^2 - 15х - 32х^2 + 24х = - 26х^2 + 9х = - х•( 26х - 9 )
х = - 1
1•( - 26 - 9 ) = - 35
Ответ ( - 35 )