Question

factorise m*2 - 2mn -21​

Answer 1

Step-by-step explanation:

solve by -b+under root (b^2-4ac)/2ac

Answer 2

Answer:

Your question is wrong correct is

m^2-4m-21

m^2-7m+3m-21

(m-7) (m+3) ans......

I will also make your given question by using iota complex no class11