Question

7. Simplify: 3a (a - b + c) +2b (a + b-c) - 2c (a-b-c)​

Answer 1

Step-by-step explanation:

3a(a-b+c)+2b(a+b-c)-2c(a-b-c)

3a²-3ab+3ac+2ab+2b²-2bc-2ac+2bc+2c²

3a²+2b²+2c²-ab+ac

3a²+2b²+2c²-a(b-c)