This would be easier with operational signs but assuming everything is added together, the answer is (8x + 9)(8x + 9) or (8x + 9)2
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Since 81 is not divisible by 7 therefore, 7 is not a factor of 81.
Nine is the highest common factor of 81 and 9
No, 18 is not a factor of 81.
The GCF of 53 and 81 is 1.
The greatest common factor of 56 and 81 is 1.