6m2-5mn-21n2-2m-3n factorise
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Answered by
0
Answer:
sorry bro i dont understant ehat you want to say what is 6m2!
Step-by-step explanation:
Answered by
4
Answer:
Step-by-step explanation:
6m^2-5mn-21n^2-2m-3n
= 6m^2-14mn+9mn-21n^2-(2m-3n)
= {2m(3m-7n)+3n(3m-7n)}-(2m-3n)
= (3m-7n) (2m+3n)-(2m+3n)
= (2m+3n) (3m-7n-1)
Answer: (2m+3n) (3m-7n-1)
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