What are the zeros for both functions

the zero of a function is the value of x which makes the final value zero

First Equation:

So let 25 - 2x equal to 0

25 - 2x = 0

x = 12.5

Second Equation:

Let 2x² - 11x - 6 equal to zero

2x² - 11x - 6 = 0

2x² - 12x + x - 6 = 0 (Splitting the middle term)

2x(x - 6) + 1(x - 6) = 0

(2x + 1) (x - 6) = 0

So we can transpose either one of the brackets below the zero

(2x + 1) = 0                 or             (x-6) = 0

x = -1/2                      or             x = 6