Question

Factorise the following by using the suitable identities. 25m²n²-49​

Answer 1

solution ;

given,

25m^2n^2-49

(5mn)^2 - (7)^2 [ square of 5 is 25 n 7 is 49 so we can convert it to whole square .]

(5mn+7) (5mn-7) [ in the form of a^2-b^2]