Question

Dacă A={ x ∈ Z | $(x-6)^{2}$ = 25} , atunci A={...}

Mulţumesc ! ^^

Answer 1

(x-6)² =25

√(x-6)² =√25

|x-6|=5

x-6=5    x-6 =-5
x= 11      x=1   =>A={1,11}