Question

Add:
(i) 3a - 2b + 5c, 2a + 5b - 7c, - a - b + c​

Answer 1

Answer:

3a - 2b + 5c + 2a + 5b - 7c - a - b + c

= ( 3a + 2a - a ) + ( -2b + 5b - b ) + ( 5c - 7c + c )

= 4a + 2b + ( -c )

= 4a + 2b - c

Answer 2

Step-by-step explanation:

3a-2b+5c+(2a+5b-7c)+(-a-b+c)

3a-2b+5c+2a+5b-7c-a-b+c

3a+2a-a-2b+5b-b+5c-7c+c

5a-a-3b+5b+6c-7c

4a+2b-c

hope it helps you

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