a) x<0 atunci x<0<1 si, 1>x si 1-x>0 deci |1-x|=1-x
si
-x+2x+1+1-x=2
b) x<5 deci |x-5|=5-x
atunci
x²+1 +5(5-x)-16-x²=1+25-5x-16=26-16-5x=10-5x=-5x+10
c) x>-3 deci |x+3|=x+3
|2x-4|=2|x-2| dar x<1<2 deci |x-2|=2-x
x<1 atunci |x-1|=1-x
atunci
-(x+3)+|x-1|-2(2-x)=
=-x-3+1-x-4+2x=-2-4=-6
