Question

Simplify: `3"a"xx[8"b" ÷ 4-6{"a"-(5"a"-overline(3"b"-2"a"))} ]`

Answer 1

`3"a"xx[8"b" ÷ 4-6{"a"-(5"a"-overline(3"b"-2"a"))}]`

`=3"a"xx[(8"b")/4-6{"a"-(5"a"-3"b"+2"a")}]`

= 3a × [2b − 6 {a − 7a + 3b}]

= 3a × [2b − 6 {−6a + 3b}]

= 3a × [2b + 36a − 18b]

= 3a × [36a − 16b]

= 108a² − 48ab