Question

9. Add the sum of  (m^ - mn + n) and (mn - n + 2) to the product of  (m + n - 3)and(m - n + 1).​

Answer 1

$= m - mn + n + mn - n + 2$

$= m + 2$

$(m + n - 3)(m - n + 1)$

$= {m}^{2} - mn + m + mn - {n}^{2} + n + m + n - 3 \\ by \: adding \: both$

$= m + 2 + {m}^{2} - mn + m + mn - {n}^{2} + n + m + n - 3$

$= {m}^{2} - {n}^{2} + 3m + 2n - 1$

Answer 2

Answer:

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