Divide: fracx2+5x+4x+1divfracx2+3x−4x−1\\frac{x^2+5x+4}{x+1} \\div \\frac{x^2+3x-4}{x-1}fracx2+5x+4x+1divfracx2+3x−4x−1 (assume xneq1,−1,−4x \\neq 1,-1,-4xneq1,−1,−4).
frac(x+4)(x−1)(x+4)(x−1)\\frac{(x+4)(x-1)}{(x+4)(x-1)}frac(x+4)(x−1)(x+4)(x−1)
111
x−1x-1x−1
x+4x+4x+4