Identify Structure: Identify the structure of the quadratic expression.The given expression is in the form of a quadratic trinomial ax2+bx+c. In this case, a=9, b=30, and c=25, with m and n being the variables.
Pattern Recognition: Look for a pattern that resembles a perfect square trinomial.A perfect square trinomial is of the form (x+y)2=x2+2xy+y2. We can see that 9m2 is a perfect square (3m)2, 25n2 is a perfect square (5n)2, and the middle term 30mn is twice the product of 3m and 5n, which suggests that the given expression might be a perfect square trinomial.
Factor as Square of Binomial: Factor the expression as the square of a binomial.Since the expression fits the pattern of a perfect square trinomial, we can write it as the square of a binomial: (3m+5n)2. This is because (3m)2=9m2, 2⋅(3m)⋅(5n)=30mn, and (5n)2=25n2.