Question

when 450 is multiplied by h the product is a perfect square find the smallest possible value of h

Answer 1

H=2 if 0 doesn't count 450×2 900 which square rooted is 30 lowest possible
450 is 5×5×3×3×2 we need # to appear 2 to be a perfect square so 2 needs to be multiplied again so h=2

Answer 2

h = 2. 
450 × 2 = 900
So h = 2