Answer:
B. 8n²−16n=−68
Step-by-step explanation:
First - Distribute the n & 10
n * 8n & n * -6 = 8n² - 6n
10 * -n & 10 * 7 = -10n +70
Second - Move the 2 by subtracting
8n² - 6n - 10n +70 = 2 -> 8n² - 6n - 10n +70 - 2 = 2 - 2
Third - Combine like terms
-6n - 10n = -16n
70 - 2 = 68
8n² - 16n + 68 = 0
Fourth - Move 68 by subtracting
8n² - 16n + 68 - 68 = 0 - 68
8n² - 16n = -68
