Упростить и решите : (xy-2x+5y)*3+2(2xy+3x-6y),если x=1 2/7,y=--5/6 Хелп миии
X =1 2/7 =9/7 =3xy-6x+15y +4xy+6x-12y = =7xy +3y =y(7x +3) = (-5/6) × (7*(9/7) +3) = =(-5/6) ×(9+3) =(-5/6) ×12 =(-5*12)/6 = -5*2 = = -10