Question

Зрочно плиз!!
СПРОСТЫТЫ ВЫРАЗ!!!!!!!!!!!!!
(1.2*a-1.8*b+3)*(-2)-5(1.2*a+1.8*b-1.3)
Срочно!!!!!!!!!!!
 

Answer 1

(1.2*a-1.8*b+3)*(-2)-5(1.2*a+1.8*b-1.3)=
=-2.4a+3.6b-6-6a-9b+6.5= -3.6a-5.4b+0.5