(x^2-2x-5)(x^2+3x-1) I am goinmg to factor by taking the first parenthesis and multiplying across the second one.
x^2* x^2 + x^2*3x + x^2*(-1) -2x*x^2 -2x*3x -2x*(-1) -5*x^2 -5*3x -5*(-1) =
x^4 + 3x^3 -x^2 -2x^3 - 6x^2 + 2x - 5x^2 -15x + 5 =
x^4 + x^3 -12x^2 - 13x + 5