Question

Please tell some algebric formula​

Answer 1

Answer:

a+b-a-b=answer

Step-by-step explanation:

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Answer 2

Answer:

$(a - b) ^{2} = a ^{2} + 2ab + b {}^{2} \\ (a - b) ^{2} = 9 ^{2} - 2ab + b ^{2} \\ (a + b)(a - b) = 9 {}^{2} - b {}^{2}$

Step-by-step explanation:

I hope this answer is correct.

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