Add 5K²+6K² - 4K3 + 9K+-5 and
3k4 - 8k3 + 2k ²-12 incolumn
method.
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Answer:
-4k³+11k²+9k-5+3k^4-8k³+2k²-12
3k^4-12k³+13k²-17
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