1. ## Polynomials And Factoring

A circle has an area of (9x^2 + 30x + 25) pie square centimeters, where x is a positive integer. Determine the smallest diameter that the circle can have.

I have this question, and i don't understand it.

A circle has an area of (9x^2 + 30x + 25) pie square centimeters, where x is a positive integer. Determine the smallest diameter that the circle can have.

I have this question, and i don't understand it.
recall that the area of a circle is given by $A = \pi r^2$, where $r$ is the radius.

Note that $\pi \left( 9x^2 + 30x + 25 \right) = \pi (3x + 5)^2$

now can you continue?