Question

efetue:
A) (6x²+8x-5)+(-6x²+7x+9)

B) 9xy+6y-7)-(-8xy-7y-12)​

Answer 1

A) (6x²+8x-5)+(-6x²+7x+9)

6x² + 8x - 5 - 6x² + 7x + 9

6x² - 6x² + 8x + 7x - 5 + 9

15x + 4

B) (9xy+6y-7)-(-8xy-7y-12)

9xy + 6y - 7 + 8xy + 7y + 12

9xy + 8xy + 6y + 7y - 7 + 12

17xy + 13y + 5

Answer 2

Resposta:

$a)( { 6x}^{2} + 8x - 5) + ( - {6x}^{2} + 7x + 9) \\ { 6x}^{2} + 8x - 5 - {6x}^{2} + 7x + 9 \\ 8x - 5 + 7x + 9 \\ 15x - 5 + 9 \\ 15x + 4 \\ \\ b)(9xy + 6y - 7) - ( - 8xy - 7y - 12) \\ 9xy + 6y - 7 + 8xy + 7y + 12 \\ 17xy + 6y - 7 + 7y + 12 \\ 17xy + 13y - 7 + 12 \\ 17xy + 13y + 5$

• Espero ter ajudado.