Question 414358
{{{x^2 / (x-4) = 16 / (x-4)}}}..cross multiply


{{{x^2(x-4)  = 16(x-4)  }}}


{{{x^2cross((x-4))  = 16cross((x-4))  }}}


{{{x^2= 16}}}


{{{x= sqrt(16)}}}


{{{x}}}= +-{{{4}}}


so, the answer is c. {4,-4}