3k can mean 3,000 as k is a symbol for 1,000. If you're running a race, 3k can also mean 3 kilometers or 3,000 meters.
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assuming you mean (3k+4)^2 = 9k^2 + 24k + 16
3k + 3 = 8 3k = 8 -3 3k = 5 k = 5/3
-47 + 6k = 3k - 2Add 47 to each side:6k = 3k +45Subtract 3k from each side:3k = 45Divide each side by 3:k = 15
When factored it is: (3k+5)(k-1)
2k - 3k - m + 2m = -k + m