Factor: 5x2 – 15x – 20  Choose the correct choice from the following options.
A) (a) 5(x-4)(x+1)  B) (b) -2(x-4)(x+5)  C) (c) -5(x+4)(x-1)  D) (d) 5(x+4)(x+1)  E) (e) 5(x-4)(x-1)
5x2 – 15x – 20.   = 5(x2 – 3x – 4).   = 5(x2 – 4x + x – 4).   = 5{x(x - 4) +1(x - 4)}.   = 5(x-4)(x+1).   the answer is ((a) 5(x-4)(x+1))
<result>A</result>
Factor: 5x2 – 15x – 20