Question

by using sutuabile identity
(5m-7)²

Answer 1

Answer:

answer given

Step-by-step explanation:

25m^2 + 49 -70m

Answer 2

Step-by-step explanation:

Using identity,

$(a-b)^{2} = a^2 - 2ab + b^2$

$(5m - 7)^2 = (5m)^2 - 2 (5m) (7) + 7^2\\= 25m^2 - 70m + 49$