Question

Simplify:

−3(a + b) + 4(2a − 3b) − (2a − b) 

Answer 1

−3(a + b) + 4(2a − 3b) − (2a − b)

Here, '−' sign precedes the first and the third parenthesis. So, we will remove them and change the sign of each term within the two parenthesis.

= −3a − 3b + (4 × 2a )−(4 × 3b) − 2a + b

= − 3a − 3b + 8a − 12b − 2a + b

Rearranging and collecting the like terms:

−3a + 8a − 2a − 3b − 12b + b

= (−3 + 8 − 2)a + (−3 − 12 + 1)b

= 3a −14b