Respuesta :

Answer:

- 5x ² 15x + 10

Step-by-step explanation:

1st 7x² - 6x +4 -(12x². +9x-6)

Remove the parentheses

2nd. 7x² - 6x +4-12x²-9x+6

Collect like terms Calculate

and then there you go you got the answer

-5x ² 15x + 10

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