В)5/9*(3,6а-3 3/5б)-3/5)(4/7а-0/2б)

Question

В)5/9*(3,6а-3 3/5б)-3/5)(4/7а-0/2б)

Answer 1

5/9*(3,6а-3 3/5б)-3/5)(4/7а-0/2б)=0,5(3,6а-6,6в-0,6)(0,6а)=1,8а-3,3в-0,6(0,6а)=1,08а²-1,98ав-0,36а