Question

f(x)=4x2−8x−60 f(x)=4(x2−2x−15) f(x)=4(x−5)(x+3) whts the true statement of f(x)



A
The zeros of f(x) are –5 and 3.

B
The vertex of the graph of f(x) is (–5, 3).

C
The vertex of the graph of f(x) is (5, –3).

D
The zeros of f(x) are 5 and –3.

Answer 1

Answer: D

Step-by-step explanation:

No such thing as a vertex of a graph... Eliminate B and C. Try f(3) = 4(3-5)(3+3) is not zero eliminate A. So answer must be D. Check: f(-3) has factor -3+3 = 0. f(5) has factor 5-5 = 0.