Question

(9x2-5x+6)+(3x2+4x-12)
(-2x2+8x-7)-(4x2-3x-7)
 Precuso de respostas certas agradeço :)

Answer 1

  



(9x2-5x+6)+(3x2+4x-12)

12x2 - x - 6

(-2x2+8x-7)-(4x2-3x-7)

  - 6x2 + 11x 

Answer 2

(9x2-5x+6)+(3x2+4x-12)(-2x2+8x-7)-(4x2-3x-7)
(18-5x+6)+(6+4x-12)(-4+8x-7)-(8-3x-7)
18-5x+6+6+4x-12-4+8x-7-8+3x+7
41-27+20x
14+20x