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

f(x) = x2 + 4x - 21
Cf(x) = x2 - 4x - 21
Cf(x) = x2 - 10x + 21
f(x) = x2 - 10x - 21

User Iblazevic
by
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1 Answer

2 votes

Answer:

f(x) = x2 – 10x + 21

Explanation:

I got it because you substract and add the last part