add - 5xsquare + 6ysquare + 6z and 7xsqare + 9ysquare + 10z
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Answer:
12x²+13y²+16z
Step-by-step explanation:
5x²+6y²+6z + 7x²+9y²+ 10z
5x²+7x²+6y²+9y²+6z+10z
12x²+13y²+16z
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