Question

15+ (-19) - 13-(-10)​

Answer 1

Answer:

-7...................

Answer 2

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).