Question

Sa se determine multimile:

a) {x∈N| |x+2|=5}
b){x∈R| |x+1| + |x-3|-4}
c){x∈R| |x+2|+1=0}

DAU COROANA

Answer 1

|x+2|=5
x+2=-5 sau x+2=5
x=-5-2. x=5-2
x=-7. x=3