Answer:
[tex]4x^{2}[/tex]
Step-by-step explanation:
You have to line up all your factors.
[tex]28x^3 =2*2*7*x*x*x\\16x^2y^2=2*2*2*2*x*x*y*y\\[/tex]
Isolate what factors they have in common... and solve!
[tex]2*2*x*x\\4*x*x\\4x^2[/tex]
Hope this helps!
