Question

(a-1 + b-1) ÷ (ab)-1 +(a-1 - b-1) ÷ ( a-2 - b-2)​

Answer 1

Answer:

$a {}^{2} + (2b - 6)a - b {}^{2} - 2b + 8 \a.b.(a - 4 - b)$

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