Question

resolve into factors 49m²n²+42 mn +9​

Answer 1

Answer:

49m^2n^2 + (21mn+21mn) + 9

49m^2n^2 + 21mn + 21mn + 9

7mn(7mn + 3) + 3(7mn + 3)

(7mn+3)(7mn+ 3)

hope it will help you