Question

Bỏ ngoặc rồi tính: -(a-b+c)-(a+b+c)

Answer 1

-2a - 2c

Answer 2

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

=(b-b)-a-a-c-c

=0-(a-a)-c-c

=0-0-c-c

=0-0-0

=0

Answer 3

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

=-2a-2c

cái này cũng ko bít làm ak

Answer 4

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

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

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

=-2a+0-2c

=-2a-2c