Question

answer this question
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Answer 1

Answer:

this question is not very difficult

answer is 26.

Step-by-step explanation:

if you know this identity than you will can easily solve this question (a+b+c)² = a²+b²+c²+2ab+2bc+2ca

now we know two values that is,

(9)² = a²+b²+c² +2(ab+bc+ca)

so your answer is 81-55 = 26

Answer 2

Answer:

81-55=66

answer

Step-by-step explanation:

hope it helps

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