Which of the following mathematical expressions is

equivalent to the verbal expression “A number, x,

squared is 39 more than the product of 10 and x” ?

F. 2x = 39 + 10x

G. 2x = 39x + 10x

H. x^2 = 390 − 10x

J. x^2 = 390 + x^10

K. x^2 = 390 + 10x