Question

The coefficient of mn, if 49m² + ?mn + 100 n^2is a perfect square trinomial is
(i) 70
(ii) 140
(iii) 490​

Answer 1

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The coefficient of mn, if 49m² + ?mn + 100 n^2is a perfect square trinomial is

(i) 70

(ii) 140✔✔

(iii) 490

Answer 2

Answer:

140 is the answer to your question