Answer:
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
