Question

Which function has real zeros at x = 3 and x = 7?

Of(x) = x2 + 4x - 21
Of(x) = x2 - 4x – 21
O f(x) = x2 – 10x + 21
Of(x) = x2 – 10x - 21

Answer 1

C. f(x) = x2 – 10x + 21

Explanation:

Just had this on a test

Answer 2

x² - 10x + 21

Explanation:

the 3rd one

(x-3)(x-7)=0