Question

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

b) -(a-b-c) + (a-b-c) Mik cần gấp mik sẽ tick cho bạn trả lời

Answer 1

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

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

= 0

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

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

= 0

Answer 2

(a-b+c) - (a-b+c)=0

Answer 3

-(a-b-c) + (a-b-c)=0

Answer 4

a: \(\left(a-b+c\right)-\left(a-b+c\right)=0\)

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

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

=0