Question

A={x apartine Z|(x-6) la puterea a doua=25}

Answer 1

$(x-6)^{2}=25 \\ x^{2} -12x+36-25=0 \\ x^{2} -12x+11=0 \\ x^{2} -x-11x+11=0 \\ x(x-1)-11(x-1)=0 \\ (x-1)(x-11)=0 \\ x-1=0 deci x=1 \\ x-11=0 deci x=11$