Question

25m^2 - 9 = 0 quadratic

Answer 1

25m^2-9=0
25m^2=9
m^2=9/25
m=3/5

Answer 2

25m^2-9=0

(5m-3)(5m+3)=0

m=3/5 or -3/5

note i have used the identity

x^2-a^2=(x+a)(x-a)

hope it helps