Question

$(m {}^{2} n {}^{2} + 2mn + 1) + (4m {}^{2} n {}^{2} + 5mn + 6)$
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Answer 1

Step-by-step explanation:

Question:

$(m {}^{2} n {}^{2} + 2mn + 1) + (4m {}^{2} n {}^{2} + 5mn + 6)$

Solution:

$= ( m {}^{2} n {}^{2} + 2mn + 1) + (4m {}^{2} n {}^{2} + 5mn + 6 ) \\ \\ = m {}^{2} n {}^{2} + 2mn + 1 + 4m {}^{2} n {}^{2} + 5mn + 6 \\ \\ = 5 {m}^{2} {n}^{2} + 7mn + 7$