Seven x squared minus fourteen x?

Answer 1

Pi

Ok, it really cannot be answered without knowing to what it is equal and to which form of the equation you are referring:

(7x)^2 - 14x = 49x^2 - 14x =7(7x^2 - 2x)

or

7(x^2) - 14x = 7(x^2 - 2x)