Question

PLZ HELP ASAP 30 POINTS !!!! Which is a zero of the quadratic function f(x) = 9x2 – 54x – 19?

Answer 1

Answer: x =6 1/3

Step-by-step explanation:

Whichever value of x from the given option that make f(x) = 0 is the zero of f(x). x = 6 1/3 satisfies this, you can check by replacing 6 1/3 by x in the equation. 6 1/3 can be written as 19/3

f(19/3) = 9(19/3)² - 54(19/3) - 19

= 9(361/9) - 54(19/3) - 19

= 361 - 342 - 19

= 0.

The remaining values don't give 0.