Question

X2+4x-3/X4-5X2+4 what is the domain of this function

Answer 1

domain is the value of x
the demonimator cannot be zero
factor the denominator: (x^2-1)(x^2-4)≠0
factor again: (x+1)(x-1)(x+2)(x-2)≠0
x≠1,-1,2,-2
the domain is all real number except 1,-1,2,-2