( -25) x 68 + ( - 34 ) x ( - 250 )
= ( -25 ) x 34 x 2 + ( - 34 ) x ( - 250)
= 25 x 2 x ( - 34 ) + ( - 34 ) x ( - 250 )
= 50 x ( - 34 ) + ( - 34 ) x ( - 250 )
= ( - 34 ) x [ 50 + ( -250 )
= ( - 34) x ( - 200 )
= ( - 34 ) x 2 x ( -100 )
= 3400 x 2
=6800