- 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