Respuesta :

TheAnimeGirl

Answers:

  1. 2x^2+8x+3
  2. (x-12)(X+2)
  3. x-3

Solution,

  1. 3x^2+5x-6+(-x^2+3x+9)

= 3x^2+5x-6-x^2+3x+9

= 3x^2-x^2+5x+3x-6+9

=2x^2+8x+3

2. x^2-10x-24

= x^2-(12-2)x-24

= x^2-12x+2x-24

= x(x-12)+2(x-12)

=(x-12)(X+2)

3. 3x^2-9x

take the common,

= 3x(x-3)

Hope it helps

Good luck on your assignment