Question

Factor: 5x2 – 15x – 20.

(a) 5(x-4)(x+1),

(b) -2(x-4)(x+5),

(c) -5(x+4)(x-1),

(d) 5(x+4)(x+1).

Answer 1

Answer:

                 OPTION (a).

Step-by-step explanation:

5x2 – 15x – 20.

= 5(x2 – 3x – 4).

= 5(x2 – 4x + x – 4).

= 5{x(x - 4) +1(x - 4)}.

= 5(x-4)(x+1).

Answer 2

Step-by-step explanation:

Hey!!!...Here is ur answer

5x^2-15x-20

=> 5 [x^2-3x-4]

=> 5 [ x^2-4x+x-4]

=> 5[x (x-4)+1 (x-4)]

=> 5 (x-4)(x+1)

Hope it will help you