Question

thu gọn biểu thức sau: (a-b)+(b-c+a)+(c-b)

Answer 1

( a - b ) + ( b - c + a ) + ( c - b )

= a - b + b - c + a + c - b

= 2a - b

Answer 2

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

Answer 3

\(\left(a-b\right)+\left(b-c+a\right)+\left(c-b\right)\)

\(=a-b+b-c+a+c-b\)

\(=2a-b\)

Answer 4

( a - b ) + ( b - c + a ) + ( c - b )

= a - b + b - c + a + c - b

= 2a - b

Answer 5

\(\left(a-b\right)+\left(b-c+a\right)+\left(c-b\right)=a-b+b-c+a+c-b=2a-b\)