Question

5m²+31mn-28n² factorise​

Answer 1

Answer:

(5m-4n)(m+7n) is the right ans.

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Answer 2

$5m {}^{2} + 35mn {} - 4mn {} - 28n {}^{2}$

5m(m+7n) - 4n(m+7n)=0

(5m-4n) (m+7n)=0

m=4n/5 or m= -7

Brainliest! please.