Question

I don't know how to do this

Answer 1

a) 2x + 3; b) 0

Explanation:

Area =
`4\pi x^2+12\pi x+9\pi =\pi (4x^2+12x+9)=\pi (2x+3)^2`

Area =
`\pi r^2`

a) radius r = 2x + 3

b) 2x + 3 > 0

x > -3/2

The least possible integer value of x is 0