A sphere has radius 3xcm. write down an expression for the surface area of the sphere in terms of x. give your answer in the simplest form​

Therefore, the Surface Area of a Sphere with radius r equals 4πr2 . Example : Find the surface area of a sphere with radius 5 inches.

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.