Question

Adu la o formă mai simpla:
a)$|x - 2| + |4 - 2x|$
, x apartine (2, +infinit)

Answer 1

|x-2|+|4-2x|=|x-2|+|2x-4|=

|x-2|+|2(x-2)|=|x-2|+ |2||x-2|=

|x-2|+2|x-2|=

=3|x-2|

am tinut cont ca |a*b|=|a|*|b|

si ca

|x|=|-x|